NCERT Solutions for Class 10 Maths Chapter 4

Important NCERT Questions

Quadratic Equation

NCERT Books for Session 2022-2023

CBSE Board and UP Board Others state Board

EXERCISE 4.3

Page No:88

Questions No:5

# In a class test, the sum of Shefali’s marks in Mathematics and English is 30. Had she got 2 marks more in Mathematics and 3 marks less in English, the product of their marks would have been 210. Find her marks in the two subjects.

Share

Let,

Marks in maths=x

Marks in english=y

So,

x+y=30———(I)

2 more marks in maths =x+2

3 less marks in english=y-3

Product of two no. (x+2)(y-3)

So,

(x+2)(y-3)=210

xy-3x+2y-6=210

xy-3x+2y=216—————(II)

Solve these two equation by subsitution method……..