20=-50-a

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Solution for 20=-50-a equation:


Simplifying
20 = -50 + -1a

Solving
20 = -50 + -1a

Solving for variable 'a'.

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

Add 'a' to each side of the equation.
20 + a = -50 + -1a + a

Combine like terms: -1a + a = 0
20 + a = -50 + 0
20 + a = -50

Add '-20' to each side of the equation.
20 + -20 + a = -50 + -20

Combine like terms: 20 + -20 = 0
0 + a = -50 + -20
a = -50 + -20

Combine like terms: -50 + -20 = -70
a = -70

Simplifying
a = -70

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