68=.8*(200-a)

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Solution for 68=.8*(200-a) equation:


Simplifying
68 = 0.8(200 + -1a)
68 = (200 * 0.8 + -1a * 0.8)
68 = (160 + -0.8a)

Solving
68 = 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.
68 + 0.8a = 160 + -0.8a + 0.8a

Combine like terms: -0.8a + 0.8a = 0.0
68 + 0.8a = 160 + 0.0
68 + 0.8a = 160

Add '-68' to each side of the equation.
68 + -68 + 0.8a = 160 + -68

Combine like terms: 68 + -68 = 0
0 + 0.8a = 160 + -68
0.8a = 160 + -68

Combine like terms: 160 + -68 = 92
0.8a = 92

Divide each side by '0.8'.
a = 115

Simplifying
a = 115

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