Question

solve the following equations

X upon 3 + 1 =7 upon 15 ​

Answer 1

Answer:

$\frac{x}{3 + 1} = \frac{7}{15} \\ by \: cross \: multiplication \\ 15x = 7(3 + 1) \\ 15x = 7(4) \\ 15x = 28 \\ x = \frac{28}{15}$

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