2006-10-02 15:12:48 · 21 answers · asked by djollie 1 in Education & Reference ➔ Homework Help
21=6-5x (combine like terms -x -4x)
15=-5x (subtract 6 from both sides)
-3=x (divide -5 from both sides to isolate x)
2006-10-02 15:15:37 · answer #1 · answered by thatshowiroll 3 · 2⤊ 0⤋
21= 6 - x - 4x. Collect like terms. 21- 6 = 6 - 6 - x - 4x.
15 = -5x. Divide both sides of the equation by -5.
x = -3.
2006-10-02 22:28:04 · answer #2 · answered by Max 6 · 1⤊ 0⤋
X= -3
2006-10-02 22:14:43 · answer #3 · answered by Anonymous · 1⤊ 0⤋
3
2006-10-02 22:18:33 · answer #4 · answered by Sakura Haruno 3 · 0⤊ 3⤋
come on now, surely you want to try this for awhile yourself
you will need to know how to do this to pass any algebra class on earth (nearly)
21=6-x-4x
look, there is a -x and a -4x
one -x and four more -x's obviously totals to -5x
so now you have
21=6-5x
remembering that your equation will still be true if whatever change you make to one side, you also make to the other side, we will subtract 6 from both sides, to get that "-5x" term by itself (because it has the "x" in it and we are trying to solve for "x")
21-6=6-6-5x
15=-5x
now we divide both sides by -5 (again, we want to get that "x" by itself, dividing by the number in front of the x results in a one, and one "x" is what we want to know the value of)
15/-5=-5x/-5
-3=x
tadaaa
2006-10-02 22:18:40 · answer #5 · answered by enginerd 6 · 2⤊ 1⤋
21=6-5x, 21-6=-5x 15=-5x x=15/-5=-3
2006-10-02 22:18:55 · answer #6 · answered by Tony B 2 · 1⤊ 0⤋
substract 6 now it's 15= -x-4x, so thats 15= -5x x = 15/-5 or -3
2006-10-02 22:15:18 · answer #7 · answered by james w 3 · 2⤊ 0⤋
-3
2006-10-02 22:14:55 · answer #8 · answered by mooncoimprovements 2 · 1⤊ 0⤋
21 = 6 - x - 4x
21 = 6 - 5x
21 + 5x = 6 - 5x + 5x
21 + 5x = 6
21 + 5x - 21 = 6 - 21
5x = -15
5x / 5 = -15 / 5
x = -3
It's definately a NEGATIVE three!!!!!
2006-10-02 22:21:45 · answer #9 · answered by ashcatash 5 · 1⤊ 0⤋
The answer is x = 3
2006-10-02 22:15:45 · answer #10 · answered by Crystal ♥'s Raymond 3 · 0⤊ 3⤋