## henaoalexandra 2 years ago 0.26(x+40)+0.37(x+20)=-20

1. tkhunny

Were you planning to solve that? Let's see it!

2. henaoalexandra

@tkhunny i dont know how to. i got the wrong answer i just want to see the steps. can you help me?

3. tkhunny

Doesn't work that way. Prove that you can do SOEMTHING. 0.26(x+40)+0.37(x+20)=-20 Do one piece at a time. 0.26(x+40) Can you expand that?

4. henaoalexandra

.26x+10.4

5. henaoalexandra

@tkhunny

6. tkhunny

Perfect. Now the next piece. 0.37(x+20)

7. henaoalexandra

@tkhunny .37x + 7.4

8. tkhunny

There you have it. Which part of that could you not do previously? Now add them all up! 0.26x + 10.4 + 0.37x + 7.4

9. henaoalexandra

@tkhunny 3+0.11x=-20 -3 -3 0.11x=-23 divide 0.11x x=-209

10. tkhunny

0.26x + 0.37x = 0.63x 10.4 + 7.4 = 17.8 Why are you feeling a need to subtract? Did you write the problem statement incorrectly?

11. henaoalexandra

@tkhunny ohhhhh okay thank you i get it. can you help me get through other ones please?

12. henaoalexandra

2/5x-1/3x=2 @tkhunny

13. tkhunny

You'll have to be more clear. is "2/5x" this $$\dfrac{2}{5x}$$ or this$$\dfrac{2}{5}x$$? Use parentheses to be clear.

14. henaoalexandra

$\frac{ 2 }{ 5 }x$

15. henaoalexandra

@tkhunny

16. tkhunny

Now we add fractions? Denominators are 5 and 3. Go!