21y+12=7y+5

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Solution for 21y+12=7y+5 equation:


Simplifying
21y + 12 = 7y + 5

Reorder the terms:
12 + 21y = 7y + 5

Reorder the terms:
12 + 21y = 5 + 7y

Solving
12 + 21y = 5 + 7y

Solving for variable 'y'.

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

Add '-7y' to each side of the equation.
12 + 21y + -7y = 5 + 7y + -7y

Combine like terms: 21y + -7y = 14y
12 + 14y = 5 + 7y + -7y

Combine like terms: 7y + -7y = 0
12 + 14y = 5 + 0
12 + 14y = 5

Add '-12' to each side of the equation.
12 + -12 + 14y = 5 + -12

Combine like terms: 12 + -12 = 0
0 + 14y = 5 + -12
14y = 5 + -12

Combine like terms: 5 + -12 = -7
14y = -7

Divide each side by '14'.
y = -0.5

Simplifying
y = -0.5

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