20+x+y-40=58

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Solution for 20+x+y-40=58 equation:


Simplifying
20 + x + y + -40 = 58

Reorder the terms:
20 + -40 + x + y = 58

Combine like terms: 20 + -40 = -20
-20 + x + y = 58

Solving
-20 + x + y = 58

Solving for variable 'x'.

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

Add '20' to each side of the equation.
-20 + x + 20 + y = 58 + 20

Reorder the terms:
-20 + 20 + x + y = 58 + 20

Combine like terms: -20 + 20 = 0
0 + x + y = 58 + 20
x + y = 58 + 20

Combine like terms: 58 + 20 = 78
x + y = 78

Add '-1y' to each side of the equation.
x + y + -1y = 78 + -1y

Combine like terms: y + -1y = 0
x + 0 = 78 + -1y
x = 78 + -1y

Simplifying
x = 78 + -1y

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