21y+12=4y-8

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Solution for 21y+12=4y-8 equation:


Simplifying
21y + 12 = 4y + -8

Reorder the terms:
12 + 21y = 4y + -8

Reorder the terms:
12 + 21y = -8 + 4y

Solving
12 + 21y = -8 + 4y

Solving for variable 'y'.

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

Add '-4y' to each side of the equation.
12 + 21y + -4y = -8 + 4y + -4y

Combine like terms: 21y + -4y = 17y
12 + 17y = -8 + 4y + -4y

Combine like terms: 4y + -4y = 0
12 + 17y = -8 + 0
12 + 17y = -8

Add '-12' to each side of the equation.
12 + -12 + 17y = -8 + -12

Combine like terms: 12 + -12 = 0
0 + 17y = -8 + -12
17y = -8 + -12

Combine like terms: -8 + -12 = -20
17y = -20

Divide each side by '17'.
y = -1.176470588

Simplifying
y = -1.176470588

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