7a-3b=-9

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Solution for 7a-3b=-9 equation: 


Simplifying
7a + -3b = -9

Solving
7a + -3b = -9

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.
7a + -3b + 3b = -9 + 3b

Combine like terms: -3b + 3b = 0
7a + 0 = -9 + 3b
7a = -9 + 3b

Divide each side by '7'.
a = -1.285714286 + 0.4285714286b

Simplifying
a = -1.285714286 + 0.4285714286b

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