1-3a=-7-a

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Solution for 1-3a=-7-a equation:


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

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

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

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

Add '-1' to each side of the equation.
1 + -1 + -2a = -7 + -1

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

Combine like terms: -7 + -1 = -8
-2a = -8

Divide each side by '-2'.
a = 4

Simplifying
a = 4

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