3a+3b=90

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Solution for 3a+3b=90 equation: 


Simplifying
3a + 3b = 90

Solving
3a + 3b = 90

Solving for variable 'a'.

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

Add '-3b' to each side of the equation.
3a + 3b + -3b = 90 + -3b

Combine like terms: 3b + -3b = 0
3a + 0 = 90 + -3b
3a = 90 + -3b

Divide each side by '3'.
a = 30 + -1b

Simplifying
a = 30 + -1b

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