-x/3-5=2x
my answer x=5/7
2007-02-03 04:53:11 · 7 answers · asked by Dre 1 in Science & Mathematics ➔ Mathematics
-x/3-5=2x
Needs parentheses!
As written, this is the same as:
(-x/3) -5 =2x
-5 = (7/3)x
-5(3/7)=x
-15/7=x
Check:
-(-15/7)/3 -5 = 2(-15/7)
-(-5/7) -( 35/7) = -30/7
5/7 - (35/7)= 30/7
30/7 = 30/7
Done.
2007-02-03 05:01:10 · answer #1 · answered by Jerry P 6 · 1⤊ 0⤋
First you add X/3 to both side of the equatiuon, so that
-5=2x+x/3
Multiply both side by three yields
-15=6x+x
Which simplifies to
-15=7x
Therefore
x=-15/7
2007-02-03 13:01:52 · answer #2 · answered by The exclamation mark 6 · 1⤊ 0⤋
Multiply both sides by 3:
-x-15=6x
Add x from both sides:
7x=-15
Divide 7 from both sides:
x=-15/7
Check:
-(-15/7)/3-5=2(-15/7)
15/21-105/21=-30/7
-90/21=-30/7
-30/7=-30/7
The correct answer would be -15/7.
2007-02-03 13:03:52 · answer #3 · answered by Anonymous · 0⤊ 0⤋
-x/3 -5 = 2x
-5 = 2x + x/3
-5 = (6x + x)/3
-15 = (6x +x) = 7x
-15/7 = x This is the answer
2007-02-03 13:04:46 · answer #4 · answered by bignose68 4 · 0⤊ 0⤋
first, multiply everything by 3 to get -x-15=6x.
next, add 1x to each side to get -15=7x.
last, divide both sides by 7 and the answer will be -15/7.
2007-02-03 13:03:16 · answer #5 · answered by Lee 3 · 1⤊ 0⤋
-x/3 - 5= 2x
-x - 15 = 6x
-x = -6x- 15
7x= -15
x= -15/7
2007-02-03 13:27:45 · answer #6 · answered by la boucle 1 · 0⤊ 0⤋
your answer is so wrong
you need to study more &
ask questions on ANSWERS less
the answerers are so correct!!
congrats to them*********
you could also learn to spell---
2007-02-03 13:11:27 · answer #7 · answered by TP 3 · 0⤊ 0⤋