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3x-4=8x+36
Use the distributive property to multiply 4 by 2x+9.
3x-4-8x=36
Subtract 8x from both sides.
-5x-4=36
Combine 3x and -8x to get -5x.
-5x=36+4
Add 4 to both sides.
-5x=40
Add 36 and 4 to get 40.
x=\frac{40}{-5}
Divide both sides by -5.
x=-8
Divide 40 by -5 to get -8.