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11.7+2.1x=6.3x+5.4
We move all terms to the left:
11.7+2.1x-(6.3x+5.4)=0
We get rid of parentheses
2.1x-6.3x-5.4+11.7=0
We add all the numbers together, and all the variables
-4.2x+6.3=0
We move all terms containing x to the left, all other terms to the right
-4.2x=-6.3
x=-6.3/-4.2
x=1+1/2
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