Question

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Answer 1

14.

$\bf{\frac{x - 6}{4} - \frac{x - 4}{6} = 1 - \frac{x}{10} }$

$\bf\implies \: \frac{6x - 36 - 4x + 16}{24} \: = \frac{10 - x}{10}$

$\bf \implies \: \frac{2x - 20}{24} = \frac{10 - x}{10}$

$\bf\implies \: \: 20x - 200 = 240 - 24x$

$\bf\implies \: 44x = 440$

$\bf\implies \:x = 10$

15

$(a \: .) \: \: \: \: \: \: \: \: \sf\frac{4}{3} {a}^{3} b - \frac{5}{3} {a}^{2} {b}^{2} + 10a {b}^{3}$

$(b). \sf \: \: \: \: \: \: \: \: \: x {}^{3} - {y}^{3}$

Answer 2

14. x = 10

15. a. 4/3a³b -5/3a²b² +10ab³

b. x³ - y³

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