Solution 1

Question

is -2 a solution of 5a-3=-7?

Answer 1

You can check it by substitute a with -2 into the equation:

 

5 * (-2) -3 = -10-3 = -13, which does not equal to -7,

so a = -2 is not a solution to the equation.

Answer 2

Plug -2 in for a and see what happens.

 

5(-2) + 3 = -10 + 3 = -7.

 

So the answer is yes