SOLUTION: -4(z+7)=23 -90=3(-2z-8) -(7-h)=13 120=9n+6n 15q-18q-12=9

Algebra ->  Expressions-with-variables -> SOLUTION: -4(z+7)=23 -90=3(-2z-8) -(7-h)=13 120=9n+6n 15q-18q-12=9      Log On


   

Question 4975: -4(z+7)=23
-90=3(-2z-8)
-(7-h)=13
120=9n+6n
15q-18q-12=9
Answer by lotanez(23) About Me  (Show Source):
You can put this solution on YOUR website!
-4z+(-28)= 23
-4z-28+28=23+28
-4z=51
-4z/-4=51/-4
z=-12.75
3(-2z-8)=-90
-6z-24=-90
-6z-24+24=-90+24
-6z=-66
-6z/-6=-66/-6
z=11
-(7-h)=13
-7+7+h=13+7
h=20
9n+6n=120
15n=120
15n/15=120/15
n=8
15q-18q-12=9
-3q-12=9
-3q-12+12=9+12
-3q=21
-3q/-3=21/-3
q=-7