140=158-y

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Solution for 140=158-y equation:


Simplifying
140 = 158 + -1y

Solving
140 = 158 + -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.
140 + y = 158 + -1y + y

Combine like terms: -1y + y = 0
140 + y = 158 + 0
140 + y = 158

Add '-140' to each side of the equation.
140 + -140 + y = 158 + -140

Combine like terms: 140 + -140 = 0
0 + y = 158 + -140
y = 158 + -140

Combine like terms: 158 + -140 = 18
y = 18

Simplifying
y = 18

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