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y*13.4=-4.2
We move all terms to the left:
y*13.4-(-4.2)=0
We add all the numbers together, and all the variables
y*13.4+4.2=0
Wy multiply elements
13.4y+4.2=0
We move all terms containing y to the left, all other terms to the right
13.4y=-4.2
y=-4.2/13.4
y=-3.5/11.1666666667
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