SOLUTION: 3(4x+9)-2(7x-12)=81-3x.. 12x + 27 - 14x - 24 =81-3x.. 12x + 27 (-27) -14x-24 = 81-27 -3x 12x -14x -24 = 54-3x 12x-14x-24 (+24) = 54 + 24 -3x 12x-14x=78-3x -2x=78-3x -2x + (3

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: 3(4x+9)-2(7x-12)=81-3x.. 12x + 27 - 14x - 24 =81-3x.. 12x + 27 (-27) -14x-24 = 81-27 -3x 12x -14x -24 = 54-3x 12x-14x-24 (+24) = 54 + 24 -3x 12x-14x=78-3x -2x=78-3x -2x + (3      Log On


   

Question 624619: 3(4x+9)-2(7x-12)=81-3x..
12x + 27 - 14x - 24 =81-3x..
12x + 27 (-27) -14x-24 = 81-27 -3x
12x -14x -24 = 54-3x
12x-14x-24 (+24) = 54 + 24 -3x
12x-14x=78-3x
-2x=78-3x
-2x + (3x)=78-3x + 3x
1x=78 (the answer should be 30) help please
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
second line should be
12x + 27 - 14x + 24 =81-3x
(-2)*(-12)=+24
so we get
-2x+51=81-3x
subtract 51
-2x=30-3x
add 3x
x=30