I'm working on linear graphs, please help :)
2007-03-21 18:40:38 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
The first one is very simple, only one step.
3x >/= 2x-4
To get x by itself, just subtract 2x from both sides.
x >/= -4
Since there is only one x, that's all you have to do.
The second one takes a few more steps.
7(x-3)>5x-14
Start by distributing the 7.
7x-21>5x-14
Now subtract 5x from both sides, so all the x's are on the same side of the equation.
2x-21>-14
Now get all the numbers without variables alone, by addind 21 to both sides.
2x>7
Finally, get x by itself by dividing both sides by 2.
x>3.5
2007-03-21 18:50:39 · answer #1 · answered by andrea_bocelli_fan1 3 · 1⤊ 0⤋
I. 3x >= 2x -4
3x - 2x >= -4
x >= -4
II. 2x - 4 > 5x - 14
2x - 5x > -14 + 4
-3x > -10
x < 10/3
so: -4 <= x < 10/3
2007-03-22 02:37:18 · answer #2 · answered by Anonymous · 0⤊ 0⤋
3x >/ 2x - 4
sutract 2x
x >/ - 4
7(x-3)>5x-14
distribute
7x - 21 >/ 5x - 14
subtract 5x
2x - 21 > -14
ad 21
2x > 7
divide 2
x > 7/2
2007-03-22 01:45:09 · answer #3 · answered by 7 · 1⤊ 0⤋
3x > (or=to) 2x -4
x >or = -4
ie. x can be -4 or above (-3,-2,-1...)
7(x-3)>5x-14
7x-21>5x-14
2x> 7
x> 3.5
2007-03-22 01:55:44 · answer #4 · answered by Anonymous · 1⤊ 0⤋