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-24=3y+21
We simplify the equation to the form, which is simple to understand
-24=3y+21
We move all terms containing y to the left and all other terms to the right.
-3y=+21+24
We simplify left and right side of the equation.
-3y=+45
We divide both sides of the equation by -03 to get y.
y=-15
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