Question

3x+20÷5x+20=13:21 pls tell this ans
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Answer 1

$\frac{3x + 20}{5x + 20} = \frac{13}{21} \\ \\ \\ 63x + 420 = 60x + 420 \\ \\ 63x - 60x = 420 - 420 \\ \\ 3x = 0 \\ \\ x = \frac{3}{0} \\ \\ x = 0$

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Answer 2

$\frac{3x + 20}{5x + 20} = \frac{13}{21} \\ 21(3x + 20) = 13(5x + 20) \\ 63x + 420 = 65x + 260 \\ 65x - 63x = 420 - 260 \\ 2x = 160 \\ x = 80$

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