40+a-50=20

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Solution for 40+a-50=20 equation: 


Simplifying
40 + a + -50 = 20

Reorder the terms:
40 + -50 + a = 20

Combine like terms: 40 + -50 = -10
-10 + a = 20

Solving
-10 + a = 20

Solving for variable 'a'.

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

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

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

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

Simplifying
a = 30

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