500-3a=200

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Solution for 500-3a=200 equation: 


Simplifying
500 + -3a = 200

Solving
500 + -3a = 200

Solving for variable 'a'.

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

Add '-500' to each side of the equation.
500 + -500 + -3a = 200 + -500

Combine like terms: 500 + -500 = 0
0 + -3a = 200 + -500
-3a = 200 + -500

Combine like terms: 200 + -500 = -300
-3a = -300

Divide each side by '-3'.
a = 100

Simplifying
a = 100

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