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25-4x=-4(2x-5)
We move all terms to the left:
25-4x-(-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)
-4x+8x-20+25=0
We add all the numbers together, and all the variables
4x+5=0
We move all terms containing x to the left, all other terms to the right
4x=-5
x=-5/4
x=-1+1/4
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