25=.8(200-a)

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Solution for 25=.8(200-a) equation:


Simplifying
25 = 0.8(200 + -1a)
25 = (200 * 0.8 + -1a * 0.8)
25 = (160 + -0.8a)

Solving
25 = 160 + -0.8a

Solving for variable 'a'.

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

Add '0.8a' to each side of the equation.
25 + 0.8a = 160 + -0.8a + 0.8a

Combine like terms: -0.8a + 0.8a = 0.0
25 + 0.8a = 160 + 0.0
25 + 0.8a = 160

Add '-25' to each side of the equation.
25 + -25 + 0.8a = 160 + -25

Combine like terms: 25 + -25 = 0
0 + 0.8a = 160 + -25
0.8a = 160 + -25

Combine like terms: 160 + -25 = 135
0.8a = 135

Divide each side by '0.8'.
a = 168.75

Simplifying
a = 168.75

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