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0.4x+1.5=0.7x-1.2
We move all terms to the left:
0.4x+1.5-(0.7x-1.2)=0
We get rid of parentheses
0.4x-0.7x+1.2+1.5=0
We add all the numbers together, and all the variables
-0.3x+2.7=0
We move all terms containing x to the left, all other terms to the right
-0.3x=-2.7
x=-2.7/-0.3
x=9+4.4408920985006E-16/0.3
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