1. Let the number be n. According to the question, 7n + 50 + 40 = 300 ⇒ 7n+90 = 300 ⇒ 7n = 300-90 ⇒ 7n = 210 ⇒ 7n = 210/7 ⇒ n = 30 Thus, the required number is 30. Class 7 Maths Chapter 4 Exercise 4.4 for more answers vist to: https://www.tiwariacademy.com/ncert-solutions/class-7/maths/chapter-4/

    Let the number be n.
    According to the question, 7n + 50 + 40 = 300
    ⇒ 7n+90 = 300
    ⇒ 7n = 300-90
    ⇒ 7n = 210
    ⇒ 7n = 210/7
    ⇒ n = 30
    Thus, the required number is 30.

    Class 7 Maths Chapter 4 Exercise 4.4

    for more answers vist to:
    https://www.tiwariacademy.com/ncert-solutions/class-7/maths/chapter-4/

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    • 5
  2. Let the number of marbles Parmit has be m. According to the question, 5m + 7 = 37 ⇒ 5m = 37 - 7 ⇒ 5m = 30 ⇒ m = 30/5 ⇒ m = 6 Thus, Parmit has 6 marbles. Class 7 Maths Chapter 4 Exercise 4.4 for more answers vist to: https://www.tiwariacademy.com/ncert-solutions/class-7/maths/chapter-4/

    Let the number of marbles Parmit has be m.
    According to the question, 5m + 7 = 37
    ⇒ 5m = 37 – 7
    ⇒ 5m = 30
    ⇒ m = 30/5
    ⇒ m = 6
    Thus, Parmit has 6 marbles.

    Class 7 Maths Chapter 4 Exercise 4.4

    for more answers vist to:
    https://www.tiwariacademy.com/ncert-solutions/class-7/maths/chapter-4/

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    • 4
  3. (a) Let the lowest marks be y. According to the question, 2y+7 = 87 ⇒ 2y = 87-7 ⇒ 2y = 80 ⇒ y = 80/2 ⇒ y = 40 Thus, the lowest score is 40. (b) Let the base angle of the triangle be b. Given, a = 40°,b = c Since, a+b+c = 180° [Angle sum property of a triangle] ⇒ 40°+b+b = 180° ⇒ 40° + 2b = 180° ⇒ 2bRead more

    (a) Let the lowest marks be y.
    According to the question, 2y+7 = 87
    ⇒ 2y = 87-7
    ⇒ 2y = 80
    ⇒ y = 80/2
    ⇒ y = 40
    Thus, the lowest score is 40.

    (b) Let the base angle of the triangle be b.
    Given, a = 40°,b = c
    Since, a+b+c = 180° [Angle sum property of a triangle]
    ⇒ 40°+b+b = 180°
    ⇒ 40° + 2b = 180°
    ⇒ 2b = 180°-40°
    ⇒ 2b = 140°
    ⇒ b = 140°/2
    ⇒ b =70°

    Thus, the base angles of the isosceles triangle are 70° each.
    (c) Let the score of Rahul be x runs and Sachin’s score is 2 . x
    According to the question, x + 2x = 198
    ⇒ 3x=198
    ⇒ x = 198/3
    ⇒ x = 66
    Thus, Rahul’s score = 66 runs
    And Sachin’s score = 2 x 66 = 132 runs.

    Class 7 Maths Chapter 4 Exercise 4.4

    for more answers vist to:
    https://www.tiwariacademy.com/ncert-solutions/class-7/maths/chapter-4/

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    • 4
  4. (a) Let the number be x. According to the question, 8x + 4 = 60 ⇒ 8x=60-4 ⇒ 8x = 56 ⇒ x = 56/8 ⇒ x = 7 (b) Let the number be y. According to the question, y/5 - 4 = 3 ⇒ y/5 = 3+4 ⇒ y/5 = 7 ⇒ y = 7x5 ⇒ y = 35 Class 7 Maths Chapter 4 Exercise 4.4 for more answers vist to: https://www.tiwariacademy.comRead more

    (a) Let the number be x.
    According to the question, 8x + 4 = 60
    ⇒ 8x=60-4
    ⇒ 8x = 56
    ⇒ x = 56/8
    ⇒ x = 7

    (b) Let the number be y.
    According to the question, y/5 – 4 = 3
    ⇒ y/5 = 3+4
    ⇒ y/5 = 7
    ⇒ y = 7×5
    ⇒ y = 35

    Class 7 Maths Chapter 4 Exercise 4.4

    for more answers vist to:
    https://www.tiwariacademy.com/ncert-solutions/class-7/maths/chapter-4/

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    • 3
  5. (iii) x =-2 Multiplying both sides by 3 3x=-6 Adding 10 to both sides 3x+10 = -6+10=3x+10=4

    (iii) x =-2
    Multiplying both sides by 3
    3x=-6
    Adding 10 to both sides
    3x+10 = -6+10=3x+10=4

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    • 4