3a-5=9a+7

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


Simplifying
3a + -5 = 9a + 7

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

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

Solving
-5 + 3a = 7 + 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.
-5 + 3a + -9a = 7 + 9a + -9a

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

Combine like terms: 9a + -9a = 0
-5 + -6a = 7 + 0
-5 + -6a = 7

Add '5' to each side of the equation.
-5 + 5 + -6a = 7 + 5

Combine like terms: -5 + 5 = 0
0 + -6a = 7 + 5
-6a = 7 + 5

Combine like terms: 7 + 5 = 12
-6a = 12

Divide each side by '-6'.
a = -2

Simplifying
a = -2

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