8y+21=3y+7

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Solution for 8y+21=3y+7 equation:


Simplifying
8y + 21 = 3y + 7

Reorder the terms:
21 + 8y = 3y + 7

Reorder the terms:
21 + 8y = 7 + 3y

Solving
21 + 8y = 7 + 3y

Solving for variable 'y'.

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

Add '-3y' to each side of the equation.
21 + 8y + -3y = 7 + 3y + -3y

Combine like terms: 8y + -3y = 5y
21 + 5y = 7 + 3y + -3y

Combine like terms: 3y + -3y = 0
21 + 5y = 7 + 0
21 + 5y = 7

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

Combine like terms: 21 + -21 = 0
0 + 5y = 7 + -21
5y = 7 + -21

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

Divide each side by '5'.
y = -2.8

Simplifying
y = -2.8

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