3(7-3y)=9

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Solution for 3(7-3y)=9 equation: 


Simplifying
3(7 + -3y) = 9
(7 * 3 + -3y * 3) = 9
(21 + -9y) = 9

Solving
21 + -9y = 9

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 + -9y = 9 + -21

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

Combine like terms: 9 + -21 = -12
-9y = -12

Divide each side by '-9'.
y = 1.333333333

Simplifying
y = 1.333333333

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