## anonymous 4 years ago Currently, Sam's coach is twice as old as Sam. When Sam started soccer 10 years ago, his coach was 3 times his age. How old is Sam now?

1. goformit100

@satellite73

2. anonymous

help

3. anonymous

|dw:1350960568419:dw|

4. anonymous

50

5. anonymous

multiply 5 to both sides

6. anonymous

|dw:1350960670105:dw|

7. anonymous

c = 2s c-10 = 3(s-10) --> c - 10 = 3s - 30 --> c = 3s - 20 2s = 3s - 20 s = 20 c = 40 Wow that should not have been that hard for me. Sorry it took so long

8. anonymous

|dw:1350960915774:dw|

9. anonymous

Now he is twice sam's age. That is where the first equation came from. 10 years ago, so start with c - 10 and s - 10, the coach was 3 times sam's age. That is where the 3 comes from. I simplified then substituted in the 2s for c to solve for s. Then I knew c

10. anonymous

can you please solve the new problem on top

11. anonymous

y/-2 + 5 = 12 y/-2 + 5 - 5 = 12 - 5 y/-2 = 7 -2 * y/-2 = 7 * -2 y = -14

12. anonymous

$x=\frac{ x-6 }{ 2 } =3$$2x=2\times \frac{ x-6 }{ 2 } =3 \times 2$$2x=x-6 =6$Impossible, was there a typo in your original equation

13. anonymous

|dw:1350961540644:dw|