3a-13-9a+4=a+18-5a+7

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Solution for 3a-13-9a+4=a+18-5a+7 equation:


Simplifying
3a + -13 + -9a + 4 = a + 18 + -5a + 7

Reorder the terms:
-13 + 4 + 3a + -9a = a + 18 + -5a + 7

Combine like terms: -13 + 4 = -9
-9 + 3a + -9a = a + 18 + -5a + 7

Combine like terms: 3a + -9a = -6a
-9 + -6a = a + 18 + -5a + 7

Reorder the terms:
-9 + -6a = 18 + 7 + a + -5a

Combine like terms: 18 + 7 = 25
-9 + -6a = 25 + a + -5a

Combine like terms: a + -5a = -4a
-9 + -6a = 25 + -4a

Solving
-9 + -6a = 25 + -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 + -6a + 4a = 25 + -4a + 4a

Combine like terms: -6a + 4a = -2a
-9 + -2a = 25 + -4a + 4a

Combine like terms: -4a + 4a = 0
-9 + -2a = 25 + 0
-9 + -2a = 25

Add '9' to each side of the equation.
-9 + 9 + -2a = 25 + 9

Combine like terms: -9 + 9 = 0
0 + -2a = 25 + 9
-2a = 25 + 9

Combine like terms: 25 + 9 = 34
-2a = 34

Divide each side by '-2'.
a = -17

Simplifying
a = -17

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