Question

cross multiplication of 7/x = 21/1​

Answer 1

Step-by-step explanation:

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Answer 2

$\large\sf \frac{7}{x} = \frac{21}{1} \\ \\ \rm{cross \: \: multiplying \: : } \\ \\ \large\tt 7 \times 1 = 21 \times x \\ \\ \large \tt7 = 21x \\ \\ \large\sf{ x = \frac{7}{21} } \\ \\ \large \sf \boxed{ x = \color{blue} \frac{1}{3} }$

$\\ \\ \\ \color{red}{ \bf{Hope \: \: this \: \: helps \: \: you \: !}}$