Question

a) x/4 = 15/6 b) 63/x = 9/7
x= x=

Answer 1

$\frac{x}{4} = \frac{15}{6} \\ 6(x) = 4(15) \\ 6x = 60 \\ x = \frac{60}{6} \\ x = 10 \\ comprobamos = \\ \frac{x}{4} = \frac{15}{6} \\ \frac{10}{4} = \frac{15}{6} \\ (6)(10) = (15)(4) \\ 60 = 60$

$\frac{63}{x} = \frac{9}{7} \\ 7(63) = (9)x \\ 441 = 9x \\ \frac{441}{9} = x \\ 49 = x \\ comprobamos = \\ \frac{63}{x} = \frac{9}{7} \\ \frac{63}{(49)} = \frac{9}{7} \\ \frac{ 63}{49} \div \frac{7}{7} = \frac{9}{7} \\ \frac{ \frac{63}{7} }{ \frac{49}{7} } = \frac{9}{7} \\ \frac{9}{7} = \frac{9}{7}$

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