Answer:
see explanation
Step-by-step explanation:
The error is in Step 1, by not adding 2 on the left side, that is
Given
7.7 = w - 2 ( add 2 to both sides )
7.7 + 2 = w - 2 + 2
9.7 = w
10% of what is 9...
0.10x = 9
x = 9/0.10
x = 90.....he has 90 all together
Answer:
Your answer to this question is 16
