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4(1.25y+4.2)=16.8
We move all terms to the left:
4(1.25y+4.2)-(16.8)=0
We add all the numbers together, and all the variables
4(1.25y+4.2)-16.8=0
We multiply parentheses
4y+16.8-16.8=0
We add all the numbers together, and all the variables
4y=0
y=0/4
y=0
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