a+7b=3

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Solution for a+7b=3 equation: 


Simplifying
a + 7b = 3

Solving
a + 7b = 3

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.
a + 7b + -7b = 3 + -7b

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

Simplifying
a = 3 + -7b

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