75-45=y

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Solution for 75-45=y equation:


Simplifying
75 + -45 = y

Combine like terms: 75 + -45 = 30
30 = y

Solving
30 = 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.
30 + -1y = y + -1y

Combine like terms: y + -1y = 0
30 + -1y = 0

Add '-30' to each side of the equation.
30 + -30 + -1y = 0 + -30

Combine like terms: 30 + -30 = 0
0 + -1y = 0 + -30
-1y = 0 + -30

Combine like terms: 0 + -30 = -30
-1y = -30

Divide each side by '-1'.
y = 30

Simplifying
y = 30

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