3(3y-20)=21

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Solution for 3(3y-20)=21 equation:


Simplifying
3(3y + -20) = 21

Reorder the terms:
3(-20 + 3y) = 21
(-20 * 3 + 3y * 3) = 21
(-60 + 9y) = 21

Solving
-60 + 9y = 21

Solving for variable 'y'.

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

Add '60' to each side of the equation.
-60 + 60 + 9y = 21 + 60

Combine like terms: -60 + 60 = 0
0 + 9y = 21 + 60
9y = 21 + 60

Combine like terms: 21 + 60 = 81
9y = 81

Divide each side by '9'.
y = 9

Simplifying
y = 9

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