15a-20=100

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Solution for 15a-20=100 equation: 


Simplifying
15a + -20 = 100

Reorder the terms:
-20 + 15a = 100

Solving
-20 + 15a = 100

Solving for variable 'a'.

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

Add '20' to each side of the equation.
-20 + 20 + 15a = 100 + 20

Combine like terms: -20 + 20 = 0
0 + 15a = 100 + 20
15a = 100 + 20

Combine like terms: 100 + 20 = 120
15a = 120

Divide each side by '15'.
a = 8

Simplifying
a = 8

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