7a-1=8a-4

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Solution for 7a-1=8a-4 equation:


Simplifying
7a + -1 = 8a + -4

Reorder the terms:
-1 + 7a = 8a + -4

Reorder the terms:
-1 + 7a = -4 + 8a

Solving
-1 + 7a = -4 + 8a

Solving for variable 'a'.

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

Add '-8a' to each side of the equation.
-1 + 7a + -8a = -4 + 8a + -8a

Combine like terms: 7a + -8a = -1a
-1 + -1a = -4 + 8a + -8a

Combine like terms: 8a + -8a = 0
-1 + -1a = -4 + 0
-1 + -1a = -4

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

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

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

Divide each side by '-1'.
a = 3

Simplifying
a = 3

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