Question

check the given numbers are the solution for the equation :
(4x+5)-(x-2)=15 or not (x=(-1),(+2) and (-3)

Answer 1

x=-1
{4(-1)+5}-{(-1)-2}
{-4+5}-{-3}
1+3
4

x=2
{4(2)+5}-{2-2}
8+5-0
13

x=-3
{4(-3)+5}-{(-3)-2}
{-12+5}-{-5}
-7+5
-2

so none give 15

Answer 2

To know whether they are the solutions or not,put x value in the given,

Put x = -1

[4(-1)+5-(-1-2)] = 15

-4+5+1+2 = 15

4 ≠ 15

It is not solution

Put x=2,

[4(2)+5-(2-2)] = 15

8+5-0 = 15

13 ≠ 15

It is not solution,

Put x= -3

[4(-3)+5-(-3-2)] = 15

-12+5+3+2 = 15

-2 ≠ 15

It is not a solution.