-7b+3a=-13

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Solution for -7b+3a=-13 equation: 


Simplifying
-7b + 3a = -13

Reorder the terms:
3a + -7b = -13

Solving
3a + -7b = -13

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 = -13 + 7b

Combine like terms: -7b + 7b = 0
3a + 0 = -13 + 7b
3a = -13 + 7b

Divide each side by '3'.
a = -4.333333333 + 2.333333333b

Simplifying
a = -4.333333333 + 2.333333333b

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