3a+7b=85

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Solution for 3a+7b=85 equation: 


Simplifying
3a + 7b = 85

Solving
3a + 7b = 85

Solving for variable 'a'.

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

Add '-7b' to each side of the equation.
3a + 7b + -7b = 85 + -7b

Combine like terms: 7b + -7b = 0
3a + 0 = 85 + -7b
3a = 85 + -7b

Divide each side by '3'.
a = 28.33333333 + -2.333333333b

Simplifying
a = 28.33333333 + -2.333333333b

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