Question

Y and x have a proportional relationship, and y = 7 when x = 2. What is the value of x when y = 21?

Answer 1

X = 6...................................

Answer 2

Y and x have a relationship that is directly proportional;
y = 7 when x = 2
when y = 21 and x = ?
y : x
7 : 2
if we multiply 7 wit 3, the answer is 21
3 x 7 : 2 x 3
21 : 6
So, when y = 21, x = 6