Question 31: Find x knowing \(\frac{x}{{49}} = \frac{3}{7}\)

31/12/2021 // by admin// Leave a Comment

Question 31: Find x knowing \(\frac{x}{{49}} = \frac{3}{7}\)

A. x=11

B. x=21

C. x=31

D. x=41

\(\begin{aligned} &\frac{x}{{49}} = \frac{3}{7}\\ &7.x = 49.3\\ &7.x = 147\\ &x = 147:7\\ &x = 21 \end{aligned}\)

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« Question 30: Find x: \( {\mkern 1mu} {10^2} – 7\left( {x – 5} \right) = 58\)

Question 31: Calculate: \( {\mkern 1mu} 2029 – \left\{ {\left( {39 – {{\left( {{2^3}.3 – 21} \right)}^2}} \) right):3 + {{2018}^0}} \right\}\) »

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