90+2a+4a=180

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Solution for 90+2a+4a=180 equation: 


Simplifying
90 + 2a + 4a = 180

Combine like terms: 2a + 4a = 6a
90 + 6a = 180

Solving
90 + 6a = 180

Solving for variable 'a'.

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

Add '-90' to each side of the equation.
90 + -90 + 6a = 180 + -90

Combine like terms: 90 + -90 = 0
0 + 6a = 180 + -90
6a = 180 + -90

Combine like terms: 180 + -90 = 90
6a = 90

Divide each side by '6'.
a = 15

Simplifying
a = 15

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