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-7.1y+4.2=-4.2y+6.3
We move all terms to the left:
-7.1y+4.2-(-4.2y+6.3)=0
We get rid of parentheses
-7.1y+4.2y-6.3+4.2=0
We add all the numbers together, and all the variables
-2.9y-2.1=0
We move all terms containing y to the left, all other terms to the right
-2.9y=2.1
y=2.1/-2.9
y=-1/1.38095238095
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