2x & gt 1
x & gt 1/2
x+ 1 & lt; three
x & lt2
∴ 1/2<; x & lt2
(2)-3x- 1 & gt; three
3x+ 1 & lt; -3
x & lt-4/3
2x+ 1 & gt; three
2x & gt3- 1
x & gt 1
Without common parts, there is no solution.
(3)3(x- 1)+ 13 >; 5x-2 (5x)
3x-3+ 13 >5x- 10+2x
3x+ 10 >7x- 10
4x & lt20
X< five
5-(2x+ 1)& lt; 3-6 times
5-2x- 1 & lt; 3-6 times
6x-2x & lt; 3-5+ 1
4x & lt- 1
x & lt- 1/4
∴x<; - 1/4
⑷x-3(x-2)≥4
x-3x+6≥4
-2x≥-2
x≤ 1
(2) Multiply both sides of the equation by 3.
1+2x & gt; 3(x- 1)
1+2x & gt; 3x-3
2x-3x >-3- 1
X< iv
∴x≤ 1
(5) x-3(x-2)≥4
x-3x+6≥4
-2x≥4-6
x≤ 1
② Multiply both sides of the equation by 10.
2(2x- 1)>5(x+ 1)
4x-2 & gt; 5x+5
4x-5x & gt; 5+2
x & lt-7
∴x<; -7
(6) Multiply both sides of (1) equation by 2 to obtain
x+4 & lt; 2*2
x & lt0
(2) Multiply both sides of the equation by 6.
3(x+2)>2(x+3)
3x+6 >2x+6
x & gt0
Without common parts, there is no solution.