a-1=4a-40

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Solution for a-1=4a-40 equation:


Simplifying
a + -1 = 4a + -40

Reorder the terms:
-1 + a = 4a + -40

Reorder the terms:
-1 + a = -40 + 4a

Solving
-1 + a = -40 + 4a

Solving for variable 'a'.

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

Add '-4a' to each side of the equation.
-1 + a + -4a = -40 + 4a + -4a

Combine like terms: a + -4a = -3a
-1 + -3a = -40 + 4a + -4a

Combine like terms: 4a + -4a = 0
-1 + -3a = -40 + 0
-1 + -3a = -40

Add '1' to each side of the equation.
-1 + 1 + -3a = -40 + 1

Combine like terms: -1 + 1 = 0
0 + -3a = -40 + 1
-3a = -40 + 1

Combine like terms: -40 + 1 = -39
-3a = -39

Divide each side by '-3'.
a = 13

Simplifying
a = 13

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