SOLUTION: Solve __8__ = __7__ y+2 y-9 The solution to y = ??? simplify answer, use integer or fraction. Thank you in advance for your assistance. Devoted, Minka.

Algebra ->  Test -> SOLUTION: Solve __8__ = __7__ y+2 y-9 The solution to y = ??? simplify answer, use integer or fraction. Thank you in advance for your assistance. Devoted, Minka.      Log On


   

Question 459945: Solve
__8__ = __7__
y+2 y-9
The solution to y = ??? simplify answer, use integer or fraction.
Thank you in advance for your assistance.
Devoted,
Minka.
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
Solve
:
8%2F%28%28y%2B2%29%29 = 7%2F%28%28y-9%29%29
:
When you have single a fractions on each side of the equal side, you can cross multiply:
8(y-9) = 7(y+2)
:
8y - 72 = 7y + 14
:
8y - 7y = 14 + 72
:
y = 86
:
:
Check this in the original equation
8%2F%28%2886%2B2%29%29 = 7%2F%28%2886-9%29%29
8%2F88 = 7%2F77
:
How about this, is this stuff making sense to you now?
Just knowing a few rules makes it possible to solve a lot of these problems.