4a+90+(a+b)=180

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Solution for 4a+90+(a+b)=180 equation:


Simplifying
4a + 90 + (a + b) = 180

Remove parenthesis around (a + b)
4a + 90 + a + b = 180

Reorder the terms:
90 + 4a + a + b = 180

Combine like terms: 4a + a = 5a
90 + 5a + b = 180

Solving
90 + 5a + b = 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 + 5a + -90 + b = 180 + -90

Reorder the terms:
90 + -90 + 5a + b = 180 + -90

Combine like terms: 90 + -90 = 0
0 + 5a + b = 180 + -90
5a + b = 180 + -90

Combine like terms: 180 + -90 = 90
5a + b = 90

Add '-1b' to each side of the equation.
5a + b + -1b = 90 + -1b

Combine like terms: b + -1b = 0
5a + 0 = 90 + -1b
5a = 90 + -1b

Divide each side by '5'.
a = 18 + -0.2b

Simplifying
a = 18 + -0.2b

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