(9x+9) - (90-9x) = 9 solve for 'x' – InterviewSolution

1.

(9x+9) - (90-9x) = 9 solve for 'x'

Answer»

$(9x + 9) - (90 - 9x) = 9 \\ \\ 9x + 9 - 90 + 9x = 9 \\ \\ 18x = 9 + 81 \\ \\ 18x = 90 \\ x = \frac{90}{18} \\ x = 5$

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