21+7y=42

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Solution for 21+7y=42 equation: 


Simplifying
21 + 7y = 42

Solving
21 + 7y = 42

Solving for variable 'y'.

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

Add '-21' to each side of the equation.
21 + -21 + 7y = 42 + -21

Combine like terms: 21 + -21 = 0
0 + 7y = 42 + -21
7y = 42 + -21

Combine like terms: 42 + -21 = 21
7y = 21

Divide each side by '7'.
y = 3

Simplifying
y = 3

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