7a+9b=-4

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Solution for 7a+9b=-4 equation: 


Simplifying
7a + 9b = -4

Solving
7a + 9b = -4

Solving for variable 'a'.

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

Add '-9b' to each side of the equation.
7a + 9b + -9b = -4 + -9b

Combine like terms: 9b + -9b = 0
7a + 0 = -4 + -9b
7a = -4 + -9b

Divide each side by '7'.
a = -0.5714285714 + -1.285714286b

Simplifying
a = -0.5714285714 + -1.285714286b

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