Can someone please check these problems? Thank you!

Solve each equation for the indicated value.

1. a-b=-c, for a
I got a=-c+b

2. 4y+6x=12, for y
I got y=-3/2x+3

2 answers

yes
yes
john, who is 42 years old, has a nephew age 9. In how many years will the age of his nephew be one fourth john's age?