(-31)=a+(-20)

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Solution for (-31)=a+(-20) equation:


Simplifying
(-31) = a + (-20)
-31 = a + (-20)
-31 = a + -20

Reorder the terms:
-31 = -20 + a

Solving
-31 = -20 + a

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
-31 + -1a = -20 + a + -1a

Combine like terms: a + -1a = 0
-31 + -1a = -20 + 0
-31 + -1a = -20

Add '31' to each side of the equation.
-31 + 31 + -1a = -20 + 31

Combine like terms: -31 + 31 = 0
0 + -1a = -20 + 31
-1a = -20 + 31

Combine like terms: -20 + 31 = 11
-1a = 11

Divide each side by '-1'.
a = -11

Simplifying
a = -11

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