2 answers:
-5x - 3(-4x - 9) = 83
Add 5x to both sides
-3(-4x-9) = 83 + 5x
Divide by -3
-4x-9 = 83/3 + 5/3x
Subtract 5/3x
-4x -5/3x -9 = 83/3
Add 9
-17/3x = 110/3
Multiply by 3
-17x = 110
Divide by -17
X = 6 and 8/17
-5x-3(-4x -9)= 83
Distribute.
-5x+12x+27= 83 (two negatives equal a positive)
Combine like terms.
7x+27= 83
Subtract 27 from both sides.
7x= 56
Divide 7 into both sides.
x=8
I hope this helps!
~kaikers
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