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0.4x=0.3(63-x)
We move all terms to the left:
0.4x-(0.3(63-x))=0
We add all the numbers together, and all the variables
0.4x-(0.3(-1x+63))=0
We calculate terms in parentheses: -(0.3(-1x+63)), so:We get rid of parentheses
0.3(-1x+63)
We multiply parentheses
-0.3x+18.9
Back to the equation:
-(-0.3x+18.9)
0.4x+0.3x-18.9=0
We add all the numbers together, and all the variables
0.7x-18.9=0
We move all terms containing x to the left, all other terms to the right
0.7x=18.9
x=18.9/0.7
x=27
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