Gem had
79 as much money as Cathy. Gem received another $42 from her father and Cathy received $4 from her mother. In the end, Gem had $6 more than Cathy. How much did the girls have altogether in the end?
| |
Gem |
Cathy |
| Before |
7 u |
9 u |
| Change |
+ 42 |
+ 4 |
| After |
7 u + 42 |
9 u + 4 |
If Cathy received another $6 in the end, she would have the same amount of money as Gem.
9 u + 4 + 6 = 7 u + 42
9 u + 10 = 7 u + 42
9 u - 7 u = 42 - 10
2 u = 32
1 u = 32 ÷ 2 = 16
Amount that the girls had in the end
= 7 u + 42 + 9 u + 4
= 7 u + 9 u + 42 + 4
= 16 u + 46
= 16 x 16 + 46
= $302
Answer(s): $302
