21y=5(4y-6)-30

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Solution for 21y=5(4y-6)-30 equation: 


Simplifying
21y = 5(4y + -6) + -30

Reorder the terms:
21y = 5(-6 + 4y) + -30
21y = (-6 * 5 + 4y * 5) + -30
21y = (-30 + 20y) + -30

Reorder the terms:
21y = -30 + -30 + 20y

Combine like terms: -30 + -30 = -60
21y = -60 + 20y

Solving
21y = -60 + 20y

Solving for variable 'y'.

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

Add '-20y' to each side of the equation.
21y + -20y = -60 + 20y + -20y

Combine like terms: 21y + -20y = 1y
1y = -60 + 20y + -20y

Combine like terms: 20y + -20y = 0
1y = -60 + 0
1y = -60

Divide each side by '1'.
y = -60

Simplifying
y = -60

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