20+9(a-4)=-7

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Solution for 20+9(a-4)=-7 equation:


Simplifying
20 + 9(a + -4) = -7

Reorder the terms:
20 + 9(-4 + a) = -7
20 + (-4 * 9 + a * 9) = -7
20 + (-36 + 9a) = -7

Combine like terms: 20 + -36 = -16
-16 + 9a = -7

Solving
-16 + 9a = -7

Solving for variable 'a'.

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

Add '16' to each side of the equation.
-16 + 16 + 9a = -7 + 16

Combine like terms: -16 + 16 = 0
0 + 9a = -7 + 16
9a = -7 + 16

Combine like terms: -7 + 16 = 9
9a = 9

Divide each side by '9'.
a = 1

Simplifying
a = 1

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