3a-7=a+5

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


Simplifying
3a + -7 = a + 5

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

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

Solving
-7 + 3a = 5 + a

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
-7 + 3a + -1a = 5 + a + -1a

Combine like terms: 3a + -1a = 2a
-7 + 2a = 5 + a + -1a

Combine like terms: a + -1a = 0
-7 + 2a = 5 + 0
-7 + 2a = 5

Add '7' to each side of the equation.
-7 + 7 + 2a = 5 + 7

Combine like terms: -7 + 7 = 0
0 + 2a = 5 + 7
2a = 5 + 7

Combine like terms: 5 + 7 = 12
2a = 12

Divide each side by '2'.
a = 6

Simplifying
a = 6

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