Answer:
x = 7
Step-by-step explanation:
Start with your given equation.
21x - 13x = 56
Add like terms (your x's in this case).
8x = 56
Divide 8 on both sides of the equation and solve.
x = 7
Answer:
x=7
Step-by-step explanation:
21-13=8
8x=56
56/8 = 7