3(2y-7)=21

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Solution for 3(2y-7)=21 equation: 


Simplifying
3(2y + -7) = 21

Reorder the terms:
3(-7 + 2y) = 21
(-7 * 3 + 2y * 3) = 21
(-21 + 6y) = 21

Solving
-21 + 6y = 21

Solving for variable 'y'.

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

Add '21' to each side of the equation.
-21 + 21 + 6y = 21 + 21

Combine like terms: -21 + 21 = 0
0 + 6y = 21 + 21
6y = 21 + 21

Combine like terms: 21 + 21 = 42
6y = 42

Divide each side by '6'.
y = 7

Simplifying
y = 7

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