Question

a number is four times of another number if their sum is 10 find their difference​

Answer 1

Step-by-step explanation:

answer is 18

$let \: the first \: number \: be \: x \: \\ then \: second \: number \: will \: be \: 4x \: \\ 4x + x = 10 \\ 2x = 10 \div 4 \\ 2x = 2 \times \frac{1}{2 } \\ x = 1 \times \frac{5}{?20}$

Answer 2

the right answer is 1

EXPLANATION

Let a number be x

then the another number will be 4x

x + 4x = 10

2x = 10 - 4

2x = 6

x = 6 ÷ 2

x = 3

4x = 4×3=7

x=3

their difference:

7-3=1