3(15+-6y)+6y=21

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Solution for 3(15+-6y)+6y=21 equation:


Simplifying
3(15 + -6y) + 6y = 21
(15 * 3 + -6y * 3) + 6y = 21
(45 + -18y) + 6y = 21

Combine like terms: -18y + 6y = -12y
45 + -12y = 21

Solving
45 + -12y = 21

Solving for variable 'y'.

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

Add '-45' to each side of the equation.
45 + -45 + -12y = 21 + -45

Combine like terms: 45 + -45 = 0
0 + -12y = 21 + -45
-12y = 21 + -45

Combine like terms: 21 + -45 = -24
-12y = -24

Divide each side by '-12'.
y = 2

Simplifying
y = 2

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