Question

ME AJUDEM..
Inequaçoes:
A) 2x-3<6
B) 7x8 ≥ 3x+5
C) 3(x-7)+2x ≤ 10-4x
D) x/4 + 2x>15
E) 7x-8<11x+7
F) 5(4-2x) ≥4x+3
G) x/4+2>3x_9
H) 7(3x+2)>14-4(5x+3)

Answer 1

A) 2x-3<6
2x<6+3
x<9/2

B) (Vou levar em conta que esse 8 tá somando com o 7x)
7x + 8 >= 3x + 5
7x - 3x >= 5 - 8
4x >= -3
x >=  -3/4

C)3(x-7) + 2x =< 10 - 4x
3x - 21 - 10 =< -6x
3x - 31 =< -6x
9x =< 31
x =< 31/9

D) x/4 + 2x > 15
x/4 + 8x/4 > 15
9x/4 > 15
x > 60/9
x > 20/3

E) 7x-8<11x + 7
-15 < 4x
-15/4 < x

F) 5(4-2x) >= 4x + 3
20 - 10x >= 4x + 3
17 >= 14x
17/14 >= x

G) x/4 + 2>3x - 9
x/4 -12x/4 > -11
-11x/4 > -11
-11x > -44
x > 4

H) 7 (3x+2) > 14-4(5x+3)
21x + 14 > 14 -20x -12
41x > -12
x > -12/41