KERJAKAN DENGAN CARA DAN LANGKAH LANGKAH.... Question from @vianiratna

October 2018 2 50 Report

KERJAKAN DENGAN CARA DAN LANGKAH LANGKAH

Violia05 8. x-7/3 + 2x+4/5 = 5(x-7)/15 + 3(2x+4)/15 = 5x-35+6x+12/15 = 11x-23/15 [C]
9. 9/3x - 2/5x = 45/15x - 6/15x = 39/15x [C]

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MicoArrafi $$\begin{align} \frac{x-7}{3}+\frac{2x+4}{5}&=\frac{5(x-7)+3(2x+4)}{3\times5}\\&=\frac{5x-35+6x+12}{15}\\&=\frac{5x+6x+12-35}{15}\\&=\boxed{\frac{11x-23}{15}}==>\bold{(c.)} \end$
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$$\begin{align} \frac{9}{3x}-\frac{2}{5x}&=\frac{5x(9)-3x(2)}{3x\times5x}\\&=\frac{45x-6x}{15x^2}\\&=\frac{39x}{15x^2}\\&=\frac{39x:x}{15x^{2-1}}\\&=\boxed{\frac{39}{15x}}==>\bold{(c.)} \end$

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