30+x-40=20

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Solution for 30+x-40=20 equation: 


Simplifying
30 + x + -40 = 20

Reorder the terms:
30 + -40 + x = 20

Combine like terms: 30 + -40 = -10
-10 + x = 20

Solving
-10 + x = 20

Solving for variable 'x'.

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

Add '10' to each side of the equation.
-10 + 10 + x = 20 + 10

Combine like terms: -10 + 10 = 0
0 + x = 20 + 10
x = 20 + 10

Combine like terms: 20 + 10 = 30
x = 30

Simplifying
x = 30

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