Le Pre-Algebra Qtr. 4 (SY19-20) UPDATED
Lift Weights Do Not Lift
Total
Run
40
Do Not Run
Total 165
120
Can you determine what number x represents from the
information given? Explain how you got your answer

Alr cool i like typing things ; ; ! & : 9: & : & : & & 392: ; ! ,@: 929: & : 83$:

So the first thing we do is to multiply the top equation by 3. the reason i want to do this is i notice there will be a 6y on both equations and can possibly add/subtract them. so we get 6y = -3x + 27. adding that and the second equation we get 6x = 27-15 which is 12. divide by 6 and we get 2. ∴ x = 2. substituting 2 into the first equation we get 2y = -2 + 9 which is 7. divide by 2 and we get 7/2. ∴ y = 7/2, x = 2.