I can't recall some rules about x. I know x = 1. So is x-1= 0?
2007-06-19 06:26:44 · 9 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
3(7 + 2x) < 30 + 7(x - 1)
21 + 6x < 30 + 7x - 7
21 + 6x < 23 + 7x
21 + 6x - 6x < 23 + 7x - 6x
21 < 23 + x
21 - 23 < 23 + x - 23
- 2 < x
- - - - - - - - -s-
2007-06-19 06:45:19 · answer #1 · answered by SAMUEL D 7 · 1⤊ 0⤋
Open the brackets on the respective sides:
21 + 6x < 30 + 7x - 7 or
21 + 6x < 23 + 7x, subtract 21 & 6x from both sides:
21 + 6x - 21 - 6x < 23 + 7x - 21 - 6x or
0 < x + 2. Reverse the inequality x + 2 > 0. These leads to conclude x > - 2.
2007-06-19 06:37:58 · answer #2 · answered by quidwai 4 · 0⤊ 0⤋
3(7 + 2x) < 30 + 7(x - 1)
21 + 6x < 30 + 7x - 7
21 - 30 + 7 < 7x - 6x
-2 < x
x > -2
2007-06-19 06:30:25 · answer #3 · answered by topsyk 3 · 1⤊ 0⤋
21 + 6x < 30 + 7x - 7
21 + 6x < 23 + 7x
- 2 < x
x > - 2
2007-06-19 10:12:04 · answer #4 · answered by Como 7 · 0⤊ 0⤋
3(7+2x)<30+7(x-1)
2007-06-19 06:36:49
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answer #5
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answered by Anonymous
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21+6x=30+7x-7
21+6x=23+7x
6x=2+7x
0=2+x
-2
Your objective is to isolate the variable, or get it on my own onto one element with the numbers or on the different element. For the 1st situation: 7x-11=-19 - 3x Step a million. upload 3x to the two sides to get 10x-11= -19 Step 2. upload 11 to the two sides to get 10x= -8 Step 3. Now you in easy terms divide by utilizing 10 to get x=8/10 or x=4/5 If there are fractions jointly with 14 - a million/8w = 3/4w - 21 merely multiply by utilizing 8 to get entire numbers For a situation like the final one 4(3-d - 2) = 8d - 5 you could the two divide by utilizing 4 till now each and every thing(not my determination because of the fraction) which gets you 3-d-2=2d-5/4 or you could multiply it out. which effects being 12d - 8 = 8d - 5, then merely subtract 8d from the two sides and upload 8 to the two element and you get 4d = 3
2016-10-18 01:10:42 · answer #6 · answered by ? 4 · 0⤊ 0⤋
21+6x < 30+7x+7
21+6x < 37 + 7x
6x<16+7x
-x<16
x<-16??? cant remember...
2007-06-19 06:46:49 · answer #7 · answered by spanky 2 · 0⤊ 0⤋
The above is an 'inequation'. When shifting terms from LHS to RHS and vice versa you have to keep changing greater to lesser and vice-versa. Hope you understood what I mean. Tried to make it as simple as possible!
2007-06-19 06:32:30 · answer #8 · answered by Lady_Marmalade 2 · 0⤊ 0⤋
3(7+2x)<30
21+6x<30
7+2x<10
3.5+x<5
x<1.5
2007-06-19 06:33:15 · answer #9 · answered by qwerty 2 · 0⤊ 0⤋