120+80a-3=640

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Solution for 120+80a-3=640 equation:


Simplifying
120 + 80a + -3 = 640

Reorder the terms:
120 + -3 + 80a = 640

Combine like terms: 120 + -3 = 117
117 + 80a = 640

Solving
117 + 80a = 640

Solving for variable 'a'.

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

Add '-117' to each side of the equation.
117 + -117 + 80a = 640 + -117

Combine like terms: 117 + -117 = 0
0 + 80a = 640 + -117
80a = 640 + -117

Combine like terms: 640 + -117 = 523
80a = 523

Divide each side by '80'.
a = 6.5375

Simplifying
a = 6.5375

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