(17*9)-(8*9)=a*9

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Solution for (17*9)-(8*9)=a*9 equation:


Simplifying
(17 * 9) + -1(8 * 9) = a * 9

Multiply 17 * 9
(153) + -1(8 * 9) = a * 9
153 + -1(8 * 9) = a * 9

Multiply 8 * 9
153 + -1(72) = a * 9

Multiply -1 * 72
153 + -72 = a * 9

Combine like terms: 153 + -72 = 81
81 = a * 9

Reorder the terms for easier multiplication:
81 = 9a

Solving
81 = 9a

Solving for variable 'a'.

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

Add '-9a' to each side of the equation.
81 + -9a = 9a + -9a

Combine like terms: 9a + -9a = 0
81 + -9a = 0

Add '-81' to each side of the equation.
81 + -81 + -9a = 0 + -81

Combine like terms: 81 + -81 = 0
0 + -9a = 0 + -81
-9a = 0 + -81

Combine like terms: 0 + -81 = -81
-9a = -81

Divide each side by '-9'.
a = 9

Simplifying
a = 9

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