## anonymous one year ago Solve for x. Express the answer in simplest form. http://static.k12.com/bank_packages/files/media/mathml_2366bbd478fbe81c6704b0bedb20548628636baa_1.gif

1. anonymous

@Hayleymeyer

2. anonymous

We would cross multiply in this.

3. Hayleymeyer

:), so what do you think it is?

4. anonymous

Do you know how to cross multiply?

5. anonymous

so 1 x 3 and 3 x 7, since 4x - 1 is 3

6. anonymous

Well it would be $\large 3 \times 7~=~ 1 \times (4x-1)$

7. anonymous

Oh alright, so what is the next step, I'm not very good at math ://

8. anonymous

I learned some of this in 8th but then i had to take 7th grade math over again

9. anonymous

Well we're gonna simplify and then get x alone.

10. anonymous

$\large 21~=~4x-1$ Now we gotta get x alone

11. anonymous

How do we do that, just take the x out?

12. anonymous

Well first is to get the 1 to the other side. Since it's currently a negative on the right side, we'll add it on both sides. What will that look like?

13. anonymous

21 = 4x -1 +1 +1

14. anonymous

Which would be...

15. anonymous

22 = 5x

16. anonymous

The ones would cancel out. You can't add a normal integer to an integer that's multiplied by a value. It would look like this $\large 22~=~4x$ Now just divide the 4 on both sides to get the x alone.

17. anonymous

22 / 4 = 5.5

18. anonymous

and 4 / 4 = 1

19. anonymous

Correct! Good job :) So $\large 5.5~=~x$ which will be our answer :)

20. anonymous

Well, the answer shows that it has to be a fraction on my schools website :/

21. anonymous

Then just convert .5 to fraction form. Or keep it as 22/4.

22. anonymous

Alright, thank you for your help :-)

23. anonymous

$\huge \color{aqua}N\color{fuchsia}o \space \color{lime}P \color{orange}r \color{blue}o \color{maroon}b \color{red}l \color{olive}e \color{purple}m \ddot\smile$