133=.7(220-a)

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Solution for 133=.7(220-a) equation:


Simplifying
133 = 0.7(220 + -1a)
133 = (220 * 0.7 + -1a * 0.7)
133 = (154 + -0.7a)

Solving
133 = 154 + -0.7a

Solving for variable 'a'.

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

Add '0.7a' to each side of the equation.
133 + 0.7a = 154 + -0.7a + 0.7a

Combine like terms: -0.7a + 0.7a = 0.0
133 + 0.7a = 154 + 0.0
133 + 0.7a = 154

Add '-133' to each side of the equation.
133 + -133 + 0.7a = 154 + -133

Combine like terms: 133 + -133 = 0
0 + 0.7a = 154 + -133
0.7a = 154 + -133

Combine like terms: 154 + -133 = 21
0.7a = 21

Divide each side by '0.7'.
a = 30

Simplifying
a = 30

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