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8.4=5.7+y
We simplify the equation to the form, which is simple to understand
8.4=5.7+y
We move all terms containing y to the left and all other terms to the right.
-1y=+5.7-8.4
We simplify left and right side of the equation.
-1y=-2.7
We divide both sides of the equation by -01 to get y.
y=2.7
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