Answer:
D
Step-by-step explanation:
Answer:
x = 4
Step-by-step explanation:
Start by setting the two expressions equal to each other, since they're the same height.
6 + 15x = 6x + 42
Subtract 6x from both sides
6 + 9x = 42
Subtract 6 from both sides
9x = 36
Divide both sides by 9
x = 4
Answer:
B
Step-by-step explanation:
Answer:
The common denominator is 63
Step-by-step explanation:
21 x 3 = 63
9 x 7 = 63