Answer:
There is no equal sign.
Step-by-step explanation:
There is no equal sign to make it an algebraic equation.
Answer:
13+21
Step-by-step explanation:
Remember this, two negatives equals a positive.
As a result, the answer is 13+21
15 - x = 2(x + 3)
15 - x = 2x + 6
15 = 3x + 6
9 = 3x
3 = x
x = 3