Question

(a) numerator 6
Check whether the following fractions are equivalent
4/10
and
12/40
​

Answer 1

4/10 x X/X = 12/40

X/X = 12/40 x 10/40

X/X = 120/160

X/X = 3/4

We get two values of X as 3 and 4

hence the fraction 4/10 and 12/40 are not equivalent.

Edit- Better reason would be that 4X is not equal to 3X hence the condition for the fractions to be equivalent is not applied.