18=39-7y

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Solution for 18=39-7y equation:


Simplifying
18 = 39 + -7y

Solving
18 = 39 + -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.
18 + 7y = 39 + -7y + 7y

Combine like terms: -7y + 7y = 0
18 + 7y = 39 + 0
18 + 7y = 39

Add '-18' to each side of the equation.
18 + -18 + 7y = 39 + -18

Combine like terms: 18 + -18 = 0
0 + 7y = 39 + -18
7y = 39 + -18

Combine like terms: 39 + -18 = 21
7y = 21

Divide each side by '7'.
y = 3

Simplifying
y = 3

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