the sum of two numbers is 18, and the sum of the first and 2 times the second is 20. what are the numbers?

Question

i need help on this please

Answer 1

x and 18-x are the numbers

x+2(18-x)=20

x+36-2x=20

-x+36=20

-x=-36+20

-x=-16

x=16

18-16=2

16 and 2 are the numbers

check: 16+2(2)=20, 16+4=20, 20=20