3a+4b=84

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Solution for 3a+4b=84 equation: 


Simplifying
3a + 4b = 84

Solving
3a + 4b = 84

Solving for variable 'a'.

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

Add '-4b' to each side of the equation.
3a + 4b + -4b = 84 + -4b

Combine like terms: 4b + -4b = 0
3a + 0 = 84 + -4b
3a = 84 + -4b

Divide each side by '3'.
a = 28 + -1.333333333b

Simplifying
a = 28 + -1.333333333b

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