Login

Mechaghostman2 · (This post was last modified: December 27, 2017 at 3:59 am by Mechaghostman2.)

x-2
---- > 2x+7
3

X < -7, according to the back of the book, but how do I get to that?

GrandizerII · December 27, 2017 at 4:11 am

(December 27, 2017 at 3:52 am)Mechaghostman2 Wrote: x-2
---- > 2x+7
3

X < -7, according to the back of the book, but how do I get to that?

Youre right. Doesnt make sense to me, but I could be too sleepy now to think straight.

pocaracas · December 27, 2017 at 4:31 am

You solve it like a normal equation, with a small caveat: when you multiply both sides by -1, the inequality sign flips.

x - 2 > 3 (2x + 7)
x > 6x + 21 + 2
x - 6x > 23
-5x > 23
x < - 23 / 5
That's not -7... that's more like -4.(something)

GrandizerII · December 27, 2017 at 4:42 am

(December 27, 2017 at 4:31 am)pocaracas Wrote: You solve it like a normal equation, with a small caveat: when you multiply both sides by -1, the inequality sign flips.

x - 2 > 3 (2x + 7)
x > 6x + 21 + 2
x - 6x > 23
-5x > 23
x < - 23 / 5
That's not -7... that's more like -4.(something)

Thats what I got as well. So Im not nuts after all.

Login
Username:
Password:	Lost Password?
	Remember me

Possibly Related Threads...
Thread		Author	Replies	Views	Last Post
	Solving a system of two trigonometric equations	FlatAssembler	20	2825	August 9, 2023 at 11:40 pm Last Post: LinuxGal
	Differential equations	FlatAssembler	10	2334	June 29, 2019 at 4:47 pm Last Post: BrianSoddingBoru4