Question

a number when multiplied by 3 exid itself by 40 gives 55 find the number

Answer 1

the equation will be 3x+40=55
and the answer is 5
3x=55–40
3x=15
x=15/3
x=5

Answer 2

let the no. be x

the equation is,

3x+40=55
3x=55-40
3x=15 = 15/3 = 5 is answer