Question

10x+9-x+27 = 3[10(9-x)+x]​

Answer 1

Answer:

$10x + 9 - x + 27 = 3(10(9 - x) + x) \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: 9x + 36 = 3(90 - 10x + x) \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: 9x + 36 = 3(90 - 9x) \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: 9x + 36 = 270 - 27x \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: 9(x + 4) = 9(30 - 3x) \\ 9 \: will \: be \: cancelled \: on \: both \: sides \\ \: \: x + 4 = 30 - 3x \\ x + 3x = 30 - 4 \\ \: \: \: \: \: \: \: \: 4x = 26 \\ \: \: \: \: \: \: \: \: \: \: x = \frac{26}{4} = 6.5$

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