## anonymous one year ago a=[bx - c]= d

1. anonymous

2. anonymous

solve each question for x

3. anonymous

i already did it but i'm not sure if it's correct

4. freckles

do the brackets mean anything and you do know you have two equal signs right?

5. anonymous

is this some kind of algebra or something more exotic,and as freckles said do the brackets have some special you know meaning

6. anonymous

i think i wrote it wrong it's supposed to be a [bx -c] = d

7. freckles

welll okay I would divide both sides by a first isolating the thing in brackets

8. freckles

and put a little note on the side I suppose saying assuming a is not 0

9. freckles

bx-c=d/a then just undo the subtract by c by adding c on both sides

10. freckles

and then divide both sides by b making an assumption that b isn't 0

11. anonymous

i did this a [bx - c] =d divide both sides by a then [bx -c] =da bx-c =da then i add c on both sides bx=da+c over b x=da + c over b

12. freckles

if you divided both sides by a then why does it show you divided a on one side and multiplied a on the opposing side?

13. freckles

$a(bx-c)=d \\ \\ \text{ divide } a \text{ on both sides assuming } a \neq 0 \\bx-c=\frac{d}{a} \\ \text{ adding } c \text{ on both sides } bx=c+\frac{d}{a} \\ \text{ now dividing } b \text{ on both sides assuming } b \neq 0 \\ x=\frac{1}{b}(c+\frac{d}{a})$

14. anonymous

if i divide it, i have to put it as a fraction then?

15. freckles

things you divide by are things that go in the bottom like pretend we have m=3 and we wanted to divide both sides by 2 you can write that as: $\frac{1}{2}m=\frac{1}{2}(3) \\ \text{ or } \frac{m}{2}=\frac{3}{2}$

16. anonymous

yes i know but i wasnt sure about letters

17. freckles

the letters represent numbers

18. anonymous

words

19. freckles

they are to be treated just like numbers

20. anonymous

ok thanks