11a+4+a-1=9a+15

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Solution for 11a+4+a-1=9a+15 equation:


Simplifying
11a + 4 + a + -1 = 9a + 15

Reorder the terms:
4 + -1 + 11a + a = 9a + 15

Combine like terms: 4 + -1 = 3
3 + 11a + a = 9a + 15

Combine like terms: 11a + a = 12a
3 + 12a = 9a + 15

Reorder the terms:
3 + 12a = 15 + 9a

Solving
3 + 12a = 15 + 9a

Solving for variable 'a'.

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

Add '-9a' to each side of the equation.
3 + 12a + -9a = 15 + 9a + -9a

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

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

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

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

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

Divide each side by '3'.
a = 4

Simplifying
a = 4

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