[andreagle]

The second number is thrice the third number. The first number is one less than the second number. Find the 3 numbers whose sum is 48.

[jcaron2]

Your problem contains three sentences. Each one of those sentences spells out an equation. For example, if our three numbers are a, b, and c, then the first sentence says b = 3c. Can you come up with the other two equations?

Once you have the three equations, it's simply a matter of solving them simultaneously. If you don't know how to do that, let us know. We can guide you.

[jhorose03]

1st number is 20
2nd number is 21
3rd number is 7

[Sindhu_Suresh]

let
third number=x
second number=3x
first number=3x-1
(3x-1)+3x+x=48
7x-1=48
7x=48+1
7x=49
x=7:third number
3x=21:second number
3x-1=20:first number

[fretz ann]

Fred is 3 years older than his sister mary.In seven years,she will be six seventh of this age.How old are they?

[fretz ann]

A park in the shape of a rectangle has dimensions 60 m by 100 m.If the park contains a rectangular garden enclosed by a concrete terrace, how wide is the terrace if the area of the garden is one-half of the area of the park?