In this case, we'll have to carry out several steps to find the solution.
Step 01:
Data:
15x + 25 = -20
x = ?
Step 02:
We must apply the algebraic rules to find the solution.
15x + 25 = -20
15x = -20 - 25
15x = - 45
x = - 45 / 15
x = - 3
The answer is:
x = - 3