Two numbers have a sum of 18. If the small number doubled, and then subtracted from the larger number, the difference is 9. X represents the smaller number, Y represents the biggest number. Write an equation to model the difference of the numbers.

Question

Two numbers have a sum of 18. If the small number doubled, and then subtracted from  the larger number, the difference is 9. X represents the smaller number, Y represents the biggest number. Write an equation to model the difference of the numbers.

anonymous · Answer

let write the system of equatios let L be the larger one and s for smaller one 


their sum is 18

s+L=18
and the second statement says:
L-2*s=9

so 
s+L=18
-2s+L=9

Ca you make it to end now?