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3y-2+4=21
We simplify the equation to the form, which is simple to understand
3y-2+4=21
We move all terms containing y to the left and all other terms to the right.
+3y=+21+2-4
We simplify left and right side of the equation.
+3y=+19
We divide both sides of the equation by 3 to get y.
y=6.33333333333
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