a-50=.80(a-100)

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Solution for a-50=.80(a-100) equation:


Simplifying
a + -50 = 0.80(a + -100)

Reorder the terms:
-50 + a = 0.80(a + -100)

Reorder the terms:
-50 + a = 0.80(-100 + a)
-50 + a = (-100 * 0.80 + a * 0.80)
-50 + a = (-80 + 0.80a)

Solving
-50 + a = -80 + 0.80a

Solving for variable 'a'.

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

Add '-0.80a' to each side of the equation.
-50 + a + -0.80a = -80 + 0.80a + -0.80a

Combine like terms: a + -0.80a = 0.2a
-50 + 0.2a = -80 + 0.80a + -0.80a

Combine like terms: 0.80a + -0.80a = 0.00
-50 + 0.2a = -80 + 0.00
-50 + 0.2a = -80

Add '50' to each side of the equation.
-50 + 50 + 0.2a = -80 + 50

Combine like terms: -50 + 50 = 0
0 + 0.2a = -80 + 50
0.2a = -80 + 50

Combine like terms: -80 + 50 = -30
0.2a = -30

Divide each side by '0.2'.
a = -150

Simplifying
a = -150

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