Question

Use substitute to determine if x=-4 is a solution to the equation. 5+3x=-7 fill in is or is not.

Answer 1

-4 is a solution

Explanation:

x = -4

Equation:

5 + 3x = -7

Substitute x for -4

New equation:

5 + 3 x -4 = -7

Solve:

3 x -4 = -12

5 + -12 = -7

-7 = -7

Answer 2

Does fill in!!!!

Explanation:

1st substitute x with -4

5+3(-4)=-7

2nd step multiply

5-12=-7

3rd step subtract

-7=-7

so yes -4 is correct!!!!