4a+7b=-21

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Solution for 4a+7b=-21 equation: 


Simplifying
4a + 7b = -21

Solving
4a + 7b = -21

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.
4a + 7b + -7b = -21 + -7b

Combine like terms: 7b + -7b = 0
4a + 0 = -21 + -7b
4a = -21 + -7b

Divide each side by '4'.
a = -5.25 + -1.75b

Simplifying
a = -5.25 + -1.75b

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