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2007-12-30 06:44:05 · 8 answers · asked by misha 1 in Science & Mathematics Mathematics

8 answers

Hi,

For this question, we first add 4 to both sides of the equation to get:

x / 3 = 13

Next, multiply both sides by 3 in order to isolate for x alone. We will therefore get:

FINAL ANSWER: x = 39

I hope that helps you out! Please let me know if you have any other questions!

Sincerely,

Andrew

2007-12-30 06:47:59 · answer #1 · answered by The VC 06 7 · 1 2

this is of the type..

a -b =c..

so if you are subracting b from a, then doing the opposite to both sides to isolate a, which is where the variable is, we get
a-b +b=c +b.. now lets apply that to your problem..

x/3 - 4=9..
add opposite to both sides..

x/3 -4 +4 =9+4.. simplifying

we get
x/3 +0 =13

we don't actually have to write the zero, here I wrote it to let you know that when you add two opposite numbers the result is always zero..
finally we get x/3=13.. this says a number divided by 3 is 13..

to find the answer to that, we again do the opposite of operation.. and that would be multiplication.. so that
(x/3)*3 =13*3..
on the left you get x on the right you get 39..
so here is the final answer x=39.. fully explained, now you don't have to write everything I did all the time, but read it so you can know what to do next time.. hope that explains why we do what we do..

2007-12-30 14:55:40 · answer #2 · answered by JAC 3 · 0 1

x / 3 - 4 = 9
x / 3 = 9 + 4
x / 3 = 13
x = 13 x 3
x = 39

2007-12-30 15:06:37 · answer #3 · answered by viper84z 2 · 0 0

Since u r dividing 3 with the x, u have to multiply 3 with both sides.

1) x / 3 - 4 = 9

2) (x / 3 - 4 ) + 4 = 3 ( +4)~~~~~~~~~~~~~~`add both sides with 4

3) x /3 = 7 ~~~~~~~~`~~~~~~~~next multiply 3 to each side

4) 3 (x/3) = 7

5) x = 39

the answer is 39

i hope that helped!

2007-12-30 14:55:29 · answer #4 · answered by Anonymous · 0 1

x/3-4=9
x/3=9+4
x/3=13
x=13*3
x=39

2007-12-30 14:48:38 · answer #5 · answered by curiosium 1 · 0 1

x/3 = 13
x = 39

2007-12-30 18:09:58 · answer #6 · answered by Como 7 · 1 0

x=39

2007-12-30 14:49:20 · answer #7 · answered by Anonymous · 0 1

x/3 - 4 = 9
x/3 = 13
x = 39
yay!

2007-12-30 14:53:35 · answer #8 · answered by MnMS114 1 · 0 1

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