(8+3)*(15-x)=138

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Solution for (8+3)*(15-x)=138 equation: 


Simplifying
(8 + 3)(15 + -1x) = 138

Combine like terms: 8 + 3 = 11
(11)(15 + -1x) = 138
(15 * 11 + -1x * 11) = 138
(165 + -11x) = 138

Solving
165 + -11x = 138

Solving for variable 'x'.

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

Add '-165' to each side of the equation.
165 + -165 + -11x = 138 + -165

Combine like terms: 165 + -165 = 0
0 + -11x = 138 + -165
-11x = 138 + -165

Combine like terms: 138 + -165 = -27
-11x = -27

Divide each side by '-11'.
x = 2.454545455

Simplifying
x = 2.454545455

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