40-3a=-23

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Solution for 40-3a=-23 equation: 


Simplifying
40 + -3a = -23

Solving
40 + -3a = -23

Solving for variable 'a'.

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

Add '-40' to each side of the equation.
40 + -40 + -3a = -23 + -40

Combine like terms: 40 + -40 = 0
0 + -3a = -23 + -40
-3a = -23 + -40

Combine like terms: -23 + -40 = -63
-3a = -63

Divide each side by '-3'.
a = 21

Simplifying
a = 21

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