3a=100+a

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Solution for 3a=100+a equation: 


Simplifying
3a = 100 + a

Solving
3a = 100 + 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.
3a + -1a = 100 + a + -1a

Combine like terms: 3a + -1a = 2a
2a = 100 + a + -1a

Combine like terms: a + -1a = 0
2a = 100 + 0
2a = 100

Divide each side by '2'.
a = 50

Simplifying
a = 50

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