21y=4(5y-3)

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Solution for 21y=4(5y-3) equation:


Simplifying
21y = 4(5y + -3)

Reorder the terms:
21y = 4(-3 + 5y)
21y = (-3 * 4 + 5y * 4)
21y = (-12 + 20y)

Solving
21y = -12 + 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 = -12 + 20y + -20y

Combine like terms: 21y + -20y = 1y
1y = -12 + 20y + -20y

Combine like terms: 20y + -20y = 0
1y = -12 + 0
1y = -12

Divide each side by '1'.
y = -12

Simplifying
y = -12

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