100=200-7a

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Solution for 100=200-7a equation:


Simplifying
100 = 200 + -7a

Solving
100 = 200 + -7a

Solving for variable 'a'.

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

Add '7a' to each side of the equation.
100 + 7a = 200 + -7a + 7a

Combine like terms: -7a + 7a = 0
100 + 7a = 200 + 0
100 + 7a = 200

Add '-100' to each side of the equation.
100 + -100 + 7a = 200 + -100

Combine like terms: 100 + -100 = 0
0 + 7a = 200 + -100
7a = 200 + -100

Combine like terms: 200 + -100 = 100
7a = 100

Divide each side by '7'.
a = 14.28571429

Simplifying
a = 14.28571429

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