7x+13(18-x)=9(18)

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Solution for 7x+13(18-x)=9(18) equation:


Simplifying
7x + 13(18 + -1x) = 9(18)
7x + (18 * 13 + -1x * 13) = 9(18)
7x + (234 + -13x) = 9(18)

Reorder the terms:
234 + 7x + -13x = 9(18)

Combine like terms: 7x + -13x = -6x
234 + -6x = 9(18)

Multiply 9 * 18
234 + -6x = 162

Solving
234 + -6x = 162

Solving for variable 'x'.

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

Add '-234' to each side of the equation.
234 + -234 + -6x = 162 + -234

Combine like terms: 234 + -234 = 0
0 + -6x = 162 + -234
-6x = 162 + -234

Combine like terms: 162 + -234 = -72
-6x = -72

Divide each side by '-6'.
x = 12

Simplifying
x = 12

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