Question

What number should be added to each 13, 45, 18, 60 so that the new number becomes proportional?

Answer 1

Step-by-step explanation:

13+x/45+x=18+x/60+x

13+x/45+x=3+x/10+x

13+x(10+x)=45+x(3+x)

130+23x+x square =135+48x+x square

130 +23x=135+48x

23x-48x=135-130

25x=5

x=-1/5

Answer 2

Answer:

so that the answer is 3

correct