9+4(a-3)=15

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Solution for 9+4(a-3)=15 equation: 


Simplifying
9 + 4(a + -3) = 15

Reorder the terms:
9 + 4(-3 + a) = 15
9 + (-3 * 4 + a * 4) = 15
9 + (-12 + 4a) = 15

Combine like terms: 9 + -12 = -3
-3 + 4a = 15

Solving
-3 + 4a = 15

Solving for variable 'a'.

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

Add '3' to each side of the equation.
-3 + 3 + 4a = 15 + 3

Combine like terms: -3 + 3 = 0
0 + 4a = 15 + 3
4a = 15 + 3

Combine like terms: 15 + 3 = 18
4a = 18

Divide each side by '4'.
a = 4.5

Simplifying
a = 4.5

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