5y+7+2y=21

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Solution for 5y+7+2y=21 equation: 


Simplifying
5y + 7 + 2y = 21

Reorder the terms:
7 + 5y + 2y = 21

Combine like terms: 5y + 2y = 7y
7 + 7y = 21

Solving
7 + 7y = 21

Solving for variable 'y'.

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

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

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

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

Divide each side by '7'.
y = 2

Simplifying
y = 2

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