6(y+7)=9y+21

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Solution for 6(y+7)=9y+21 equation:


Simplifying
6(y + 7) = 9y + 21

Reorder the terms:
6(7 + y) = 9y + 21
(7 * 6 + y * 6) = 9y + 21
(42 + 6y) = 9y + 21

Reorder the terms:
42 + 6y = 21 + 9y

Solving
42 + 6y = 21 + 9y

Solving for variable 'y'.

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

Add '-9y' to each side of the equation.
42 + 6y + -9y = 21 + 9y + -9y

Combine like terms: 6y + -9y = -3y
42 + -3y = 21 + 9y + -9y

Combine like terms: 9y + -9y = 0
42 + -3y = 21 + 0
42 + -3y = 21

Add '-42' to each side of the equation.
42 + -42 + -3y = 21 + -42

Combine like terms: 42 + -42 = 0
0 + -3y = 21 + -42
-3y = 21 + -42

Combine like terms: 21 + -42 = -21
-3y = -21

Divide each side by '-3'.
y = 7

Simplifying
y = 7

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