Question

A boy was asked to multiply a certain number by 50. He multiplied it by 30 and got his answer less than the correct one by 400. The number to be multiplied was :

Answer 1

It will be 20

Let no be. X

50x-30x =400

20x=400

X=20

Answer 2

Step-by-step explanation:

$let \: the \: number \: be \: x.... \\ \\ by \: multiplying \: x \: b y\: 50 \: we \: get \: 50x ... \\ \\ he \: multiplied \: it \: by \: 30 \: \: that \: is \: 30x \\ \\ it \: becomes \: 400 \: less \: than \: 50x \\ \\so....accordirng \: to \: question.... \\ \\ 30x + 400 = 50 x \\ \\ 20x = 400 \\ \\ x = 20$

hope it helps..........✌✌