30+9+40=y

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Solution for 30+9+40=y equation:


Simplifying
30 + 9 + 40 = y

Combine like terms: 30 + 9 = 39
39 + 40 = y

Combine like terms: 39 + 40 = 79
79 = y

Solving
79 = y

Solving for variable 'y'.

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

Add '-1y' to each side of the equation.
79 + -1y = y + -1y

Combine like terms: y + -1y = 0
79 + -1y = 0

Add '-79' to each side of the equation.
79 + -79 + -1y = 0 + -79

Combine like terms: 79 + -79 = 0
0 + -1y = 0 + -79
-1y = 0 + -79

Combine like terms: 0 + -79 = -79
-1y = -79

Divide each side by '-1'.
y = 79

Simplifying
y = 79

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