a-4=5-4(a-4)

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Solution for a-4=5-4(a-4) equation:


Simplifying
a + -4 = 5 + -4(a + -4)

Reorder the terms:
-4 + a = 5 + -4(a + -4)

Reorder the terms:
-4 + a = 5 + -4(-4 + a)
-4 + a = 5 + (-4 * -4 + a * -4)
-4 + a = 5 + (16 + -4a)

Combine like terms: 5 + 16 = 21
-4 + a = 21 + -4a

Solving
-4 + a = 21 + -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.
-4 + a + 4a = 21 + -4a + 4a

Combine like terms: a + 4a = 5a
-4 + 5a = 21 + -4a + 4a

Combine like terms: -4a + 4a = 0
-4 + 5a = 21 + 0
-4 + 5a = 21

Add '4' to each side of the equation.
-4 + 4 + 5a = 21 + 4

Combine like terms: -4 + 4 = 0
0 + 5a = 21 + 4
5a = 21 + 4

Combine like terms: 21 + 4 = 25
5a = 25

Divide each side by '5'.
a = 5

Simplifying
a = 5

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