The answer choice A is correct
Answer:
21a+77b
Step-by-step explanation:
7x3=21
7x11=77
C is the answer I believe
First, multiply each side by 5
6(x+1) = 25x-15
distribute the 6
6x+6=25x-15
put the x's on the same side and the other numbers on the opposite side
21=19x
Divide by 19 to isolate the x
21/19=x
