Pre-algebra problem! Two-step equations!?

Question

I need to write a two-step equation for this problem:

In one season, Kim ran 18 races. This was four fewer races than twice the number of races Kelly ran. How many races did Kelly run?

Answer 1

x = kim

y = kelly



x=18

x=2y-4



i do the problem as i read it; i'm honestly not sure how to explain.

however, solving it is simple.

since both equations are equal to x, you can just set them equal to each other.

18=2y-4

22=2y

y=11

then plug in y.

x=2(11)-4

x=18

Answer 2

Kim = 18

Kim + 4 = 2Kelly

18 + 4 = 2Kelly

22 = 2Kelly

22/2 = 2Kelly/2

11 = Kelly



Kelly ran 11 races in one season, and Kim ran 18

Answer 3

2y=12 x=5y sparkling up for x, y , and z utilising this considerable equation 2x + 4y + 7z = fifty 5 initiate by utilising getting your y and plugging it in for the 2d "x" equation and flow from there...there is greater suitable than one thank you to plug and chug yet that should get you going

Answer 4

2x-4=18

+4 +4

________

2x=22

/2 /2

x=11



Kelly ran 11 races...

I think that's right...havent done 2steps in awhile!

Answer 5

18 = 2x-4



You answer it by adding 4 to both sides then dividing by 2 to give you 9.