30=70-1y

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Solution for 30=70-1y equation:


Simplifying
30 = 70 + -1y

Solving
30 = 70 + -1y

Solving for variable 'y'.

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

Add 'y' to each side of the equation.
30 + y = 70 + -1y + y

Combine like terms: -1y + y = 0
30 + y = 70 + 0
30 + y = 70

Add '-30' to each side of the equation.
30 + -30 + y = 70 + -30

Combine like terms: 30 + -30 = 0
0 + y = 70 + -30
y = 70 + -30

Combine like terms: 70 + -30 = 40
y = 40

Simplifying
y = 40

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