He has a number of problems to do and it's been years since I've done algebra (at least with fractions). The anwer would be fine but I really need the steps to work it out so he can do the rest of them . Thanks in advance:
21=-3/2(x-2). That is, 21 equals negative 3 divided by 2, times x minus 2. Thanks again.
2006-11-05 08:57:50 · 5 answers · asked by BrianR 2 in Education & Reference ➔ Homework Help
you distribute the -3/2 to the x and 2 and get 21= -3/2x+3
subtract 3
18=-3/2x
times each side by its reciprocal which would be -2/3
18x-2/3=-12
so x= -12
2006-11-05 09:02:23 · answer #1 · answered by Anonymous · 1⤊ 0⤋
21=-3/2(x-2)
42=-3(x-2) <-- multiply by 2 to clear the fraction
42=-3x+6 <---- distribute the 3
36=-3x <---- subtract 6 to both sides (6-6=0)
-12=x <---- divide both sides by -3 to get "x"
2006-11-05 17:20:25 · answer #2 · answered by julia gymnast 2 · 1⤊ 0⤋
multiply both sides by -(2/3)
-(42/3) =(x-2)
Add 2 to both sides
2- (42/3)= x
So
x = (6/3)-(42/3)
x = -36/3 = -12
Check:
-(3/2)(-12-2)= -1.5(-14) = 21
2006-11-05 17:40:55 · answer #3 · answered by Brian W 1 · 1⤊ 0⤋
21= -3/2(x-2)
turn -3/2 into a decimal- -1.5
21= -1.5(x-2)
use the distributive property to get rid of the ()
wut u do is mult. -1.5 by x and -2
21= -1.5x+3
subtract 3 on both sides
18= -1.5x
divide both sides by -1.5
12=x or x=12
2006-11-05 17:10:16 · answer #4 · answered by Anonymous · 1⤊ 0⤋
Your son needs to ask his teacher for help.
And you can go to a good bookstore, and the paper supply/computer supply store and get a MATH cd. Use it in the privacy of your home and goes from grades 9 through 12...and so forth....it's great!
I cannot do your son's homework without telling his teacher!
2006-11-05 17:01:28 · answer #5 · answered by May I help You? 6 · 0⤊ 1⤋