Question

What is the solution for x in the proportion 2/6=x/21

Answer 1

do you know how to solve proportions ?

Answer 2

2/6 = x/21
now we have to cross multiply
(6)(x) = (21)(2)

can you finish by solving for x ?

Answer 3

\[\frac{ 2 }{ 6 }=\frac{ x }{ 21 }\]
Step 1: crossmultiply
\[6x=2 \times 21\]
\[6x=42\]
Divide both sides by 6 to get the value of x
\[x=7\]

Answer 4

or..
you can reduce 2/6 to 1/3
leaving us with :
1/3 = x/21
Proportions are nothing but equivalent fractions.
so what is the equivalent fraction of 1/3 with a denominator of 21 ?