4(-3+3y)=21

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Solution for 4(-3+3y)=21 equation: 


Simplifying
4(-3 + 3y) = 21
(-3 * 4 + 3y * 4) = 21
(-12 + 12y) = 21

Solving
-12 + 12y = 21

Solving for variable 'y'.

Move all terms containing y to the left, all other terms to the right.

Add '12' to each side of the equation.
-12 + 12 + 12y = 21 + 12

Combine like terms: -12 + 12 = 0
0 + 12y = 21 + 12
12y = 21 + 12

Combine like terms: 21 + 12 = 33
12y = 33

Divide each side by '12'.
y = 2.75

Simplifying
y = 2.75

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