SOLUTION: 3y-12=18 2x+11=19 -z+7=-3 Could you help me with these problems? Thank You!!!!

Algebra ->  Inverses -> SOLUTION: 3y-12=18 2x+11=19 -z+7=-3 Could you help me with these problems? Thank You!!!!      Log On


   

Question 58145This question is from textbook Mathematics Concepts and skills
: 3y-12=18 2x+11=19 -z+7=-3 Could you help me with these problems? Thank You!!!! This question is from textbook Mathematics Concepts and skills

Answer by tutorcecilia(2152) About Me  (Show Source):
You can put this solution on YOUR website!
3y-12=18
3y-12+12=18+12
3y=12+18
3y=30
3y/3=30/3
y=10
Check by plugging (y=10) back into the original equation.
.
2x+11=19
2x+11-11=19-11
2x=19-11
2x=8
2x/2=8/2
x=4
Check by plugging (x=4) back into the original equation.
.
-z+7=-3
-z+7-7=-3-7
-z=-10
-z/-1=-10/-1
z=10
Check by plugging (z=10) back into the original equation.