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65-2x=4(2x-5)
We move all terms to the left:
65-2x-(4(2x-5))=0
We calculate terms in parentheses: -(4(2x-5)), so:We get rid of parentheses
4(2x-5)
We multiply parentheses
8x-20
Back to the equation:
-(8x-20)
-2x-8x+20+65=0
We add all the numbers together, and all the variables
-10x+85=0
We move all terms containing x to the left, all other terms to the right
-10x=-85
x=-85/-10
x=8+1/2
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