Question

find x in 21:12::x:8

Answer 1

According to the question,
$21 \div 12 = x \div 8$
By cross multiplication,

=>$21 \times 8 = 12 \times x$

=>$x = (21 \times 8 ) \div 12$
=>14.

Hope it will help you.
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Answer 2

Answer:

According to the question,

21 \div 12 = x \div 821÷12=x÷8

By cross multiplication,

=>21 \times 8 = 12 \times x21×8=12×x

=>x = (21 \times 8 ) \div 12x=(21×8)÷12

=>14.