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x-2x-5-5\left(1-2x\right)=2\left(3+4x\right)-3\left(x-4\right)
To find the opposite of 2x+5, find the opposite of each term.
-x-5-5\left(1-2x\right)=2\left(3+4x\right)-3\left(x-4\right)
Combine x and -2x to get -x.
-x-5-5+10x=2\left(3+4x\right)-3\left(x-4\right)
Use the distributive property to multiply -5 by 1-2x.
-x-10+10x=2\left(3+4x\right)-3\left(x-4\right)
Subtract 5 from -5 to get -10.
9x-10=2\left(3+4x\right)-3\left(x-4\right)
Combine -x and 10x to get 9x.
9x-10=6+8x-3\left(x-4\right)
Use the distributive property to multiply 2 by 3+4x.
9x-10=6+8x-3x+12
Use the distributive property to multiply -3 by x-4.
9x-10=6+5x+12
Combine 8x and -3x to get 5x.
9x-10=18+5x
Add 6 and 12 to get 18.
9x-10-5x=18
Subtract 5x from both sides.
4x-10=18
Combine 9x and -5x to get 4x.
4x=18+10
Add 10 to both sides.
4x=28
Add 18 and 10 to get 28.
x=\frac{28}{4}
Divide both sides by 4.
x=7
Divide 28 by 4 to get 7.