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0.12-0.03(x+1)=-0.03(3-x)
We move all terms to the left:
0.12-0.03(x+1)-(-0.03(3-x))=0
We add all the numbers together, and all the variables
-0.03(x+1)-(-0.03(-1x+3))+0.12=0
We multiply parentheses
-0.03x-(-0.03(-1x+3))-0.03+0.12=0
We calculate terms in parentheses: -(-0.03(-1x+3)), so:We add all the numbers together, and all the variables
-0.03(-1x+3)
We multiply parentheses
0.03x-0.09
Back to the equation:
-(0.03x-0.09)
-0.03x-(0.03x-0.09)+0.09=0
We get rid of parentheses
-0.03x-0.03x+0.09+0.09=0
We add all the numbers together, and all the variables
-0.06x+0.18=0
We move all terms containing x to the left, all other terms to the right
-0.06x=-0.18
x=-0.18/-0.06
x=+3
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