Question

the sum of three consecutive multiples of 5 is 945 find the largest multiple

Answer 1

let first number is x
then next multiples of 5 are x+5 , x+10

according to given condition ,

x + x+5 + x+10 = 945

3x + 15 = 945

3x = 945 -15

3x = 930

x = 310

so first number is 310
next two are 315 and 320

Answer 2

let the first no.be x,
then let the two consecutive multiples of 5 are
x+5, x+10
A.T.Q,
x+x+5+x+10=945
3x+15=945
3x=930
x=310
so, the first no.we get is 310
the next two no.s are 315 and 320