x-9(-9)=4

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Solution for x-9(-9)=4 equation: 


Simplifying
x + -9(-9) = 4

Multiply -9 * -9
x + 81 = 4

Reorder the terms:
81 + x = 4

Solving
81 + x = 4

Solving for variable 'x'.

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

Add '-81' to each side of the equation.
81 + -81 + x = 4 + -81

Combine like terms: 81 + -81 = 0
0 + x = 4 + -81
x = 4 + -81

Combine like terms: 4 + -81 = -77
x = -77

Simplifying
x = -77

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