a+2a-9=4a+7

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Solution for a+2a-9=4a+7 equation:


Simplifying
a + 2a + -9 = 4a + 7

Reorder the terms:
-9 + a + 2a = 4a + 7

Combine like terms: a + 2a = 3a
-9 + 3a = 4a + 7

Reorder the terms:
-9 + 3a = 7 + 4a

Solving
-9 + 3a = 7 + 4a

Solving for variable 'a'.

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

Add '-4a' to each side of the equation.
-9 + 3a + -4a = 7 + 4a + -4a

Combine like terms: 3a + -4a = -1a
-9 + -1a = 7 + 4a + -4a

Combine like terms: 4a + -4a = 0
-9 + -1a = 7 + 0
-9 + -1a = 7

Add '9' to each side of the equation.
-9 + 9 + -1a = 7 + 9

Combine like terms: -9 + 9 = 0
0 + -1a = 7 + 9
-1a = 7 + 9

Combine like terms: 7 + 9 = 16
-1a = 16

Divide each side by '-1'.
a = -16

Simplifying
a = -16

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