We need to find the value of
2x-7 and the value of x=-1
It’s known that we have to multiply the variable x with 2, and the value of variable x is -1…then,
2x-7,in the place of x we need to put -1 and multiply it.
=2(-1)-7
= -2 -7. (The value of 2×-1is -2)
= -9 ( the value of -2-7 is -9)……the problem is solved….

[2 x -1] -7
-2 -7
If same sign comes, find their sum and put the same sign.
So we get -[2+7] = -9

-9 is the value of 2x-7 when x=-1

2x-7 [x=1]
2*1-7= -5