7a+1=3a-9

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Solution for 7a+1=3a-9 equation:


Simplifying
7a + 1 = 3a + -9

Reorder the terms:
1 + 7a = 3a + -9

Reorder the terms:
1 + 7a = -9 + 3a

Solving
1 + 7a = -9 + 3a

Solving for variable 'a'.

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

Add '-3a' to each side of the equation.
1 + 7a + -3a = -9 + 3a + -3a

Combine like terms: 7a + -3a = 4a
1 + 4a = -9 + 3a + -3a

Combine like terms: 3a + -3a = 0
1 + 4a = -9 + 0
1 + 4a = -9

Add '-1' to each side of the equation.
1 + -1 + 4a = -9 + -1

Combine like terms: 1 + -1 = 0
0 + 4a = -9 + -1
4a = -9 + -1

Combine like terms: -9 + -1 = -10
4a = -10

Divide each side by '4'.
a = -2.5

Simplifying
a = -2.5

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