Nathan B. answered • 09/12/18

Tutor

5
(20)
Elementary and Algebraic skilled

Here's what we know

a + b + c = 83 (sum of three numbers is 83)

b = a + 4 (the second number is 4 more than the first)

c = 2a - 5 (the third is 5 less than twice the first)

We have variable values, so let's plug them in:

a + a + 4 + 2a - 5 = 83

simplify

4a - 1 = 83

Add 1 to both sides:

4a = 84

Divide by 4:

a = 21

And now that we know a, you can find b and c.