7a-9=4a+15

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Solution for 7a-9=4a+15 equation:


Simplifying
7a + -9 = 4a + 15

Reorder the terms:
-9 + 7a = 4a + 15

Reorder the terms:
-9 + 7a = 15 + 4a

Solving
-9 + 7a = 15 + 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 + 7a + -4a = 15 + 4a + -4a

Combine like terms: 7a + -4a = 3a
-9 + 3a = 15 + 4a + -4a

Combine like terms: 4a + -4a = 0
-9 + 3a = 15 + 0
-9 + 3a = 15

Add '9' to each side of the equation.
-9 + 9 + 3a = 15 + 9

Combine like terms: -9 + 9 = 0
0 + 3a = 15 + 9
3a = 15 + 9

Combine like terms: 15 + 9 = 24
3a = 24

Divide each side by '3'.
a = 8

Simplifying
a = 8

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