3a-18-7a+9=

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Solution for 3a-18-7a+9= equation:


Simplifying
3a + -18 + -7a + 9 = 0

Reorder the terms:
-18 + 9 + 3a + -7a = 0

Combine like terms: -18 + 9 = -9
-9 + 3a + -7a = 0

Combine like terms: 3a + -7a = -4a
-9 + -4a = 0

Solving
-9 + -4a = 0

Solving for variable 'a'.

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

Add '9' to each side of the equation.
-9 + 9 + -4a = 0 + 9

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

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

Divide each side by '-4'.
a = -2.25

Simplifying
a = -2.25

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