Question

Whats the answer to 4(2r+8)=88

Answer 1

Undo multiplication by 4 by dividing each side by 4.

%284%282r%2B8%29%29%2F4=88%2F4
2r%2B8=22

Next, undo the addition of 8 by subtracting 8 from each side:


2r%2B8-8=22-8
2r=14

Finally, undo the multiplication by 2 by dividing both sides by 2:
r=7

Answer 2

4(2r+8)=88
8r+32=88
8r=88-32
8r=56
r=56/8
r=7