Question

resolva as inequaçoes U=N
A) 2X+ 5<-3X+40

B)6(X-5)-2(4X+2)>10

C)7X-9<2X+16

Answer 1

a)
2x+5<-3x+40
2x+3x<40-5
5x<40-5
5x<35
x<35/5
x<7

b)
6*(x-5)-2(4x+2)>10
6x-30-8x-4>10
-2x-30-4>10
-2x-34>10
-2x>10+34
-2x>44
x<44/-2
x<-22

c)
7x-9<2x+16
7x-2x<16+9
5x<16+9
5x<25
x<25/5
x<5

Answer 2

A) 2x + 5 < -3x + 40 2x + 3x < 40 - 5 5x < 35 x < 35/5 x < 7 B) 6 . (x - 5) - 2 . (4x + 2) > 10 6x - 30 - 8x - 4 > 10 -2x > 10 + 34 -2x > 44 (-1) 2x < 44 x < 44/2 x < 22 C) 7x - 9 < 2x + 16 7x - 2x < 16 + 9 5x < 25 x < 25/5 x < 5