21y=5(4y-2)

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Solution for 21y=5(4y-2) equation: 


Simplifying
21y = 5(4y + -2)

Reorder the terms:
21y = 5(-2 + 4y)
21y = (-2 * 5 + 4y * 5)
21y = (-10 + 20y)

Solving
21y = -10 + 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 = -10 + 20y + -20y

Combine like terms: 21y + -20y = 1y
1y = -10 + 20y + -20y

Combine like terms: 20y + -20y = 0
1y = -10 + 0
1y = -10

Divide each side by '1'.
y = -10

Simplifying
y = -10

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