3a-5=-a-7

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


Simplifying
3a + -5 = -1a + -7

Reorder the terms:
-5 + 3a = -1a + -7

Reorder the terms:
-5 + 3a = -7 + -1a

Solving
-5 + 3a = -7 + -1a

Solving for variable 'a'.

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

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

Combine like terms: 3a + a = 4a
-5 + 4a = -7 + -1a + a

Combine like terms: -1a + a = 0
-5 + 4a = -7 + 0
-5 + 4a = -7

Add '5' to each side of the equation.
-5 + 5 + 4a = -7 + 5

Combine like terms: -5 + 5 = 0
0 + 4a = -7 + 5
4a = -7 + 5

Combine like terms: -7 + 5 = -2
4a = -2

Divide each side by '4'.
a = -0.5

Simplifying
a = -0.5

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