Question

1. Resolve as inequações sendo u=z

a)3x<12
b)5y-16>y+4
c)6m-2m-9<+4
d)-4a+30>-10a-6
e)2y+10<-3y-10
f)7a-4a+3>9
g)10m-12<3m-12
h)6b+b<3b-15​

Answer 1

Resposta:

Resposta A:

2x+5≥-3x+40

2x+3x≥40-5

5x≥35

x≥35/5

x≥7

Resposta B:

6(x-5)-2(4x+2)≥80

6x-30-8x-4≥80

6x-8x≥80+30+4

-2x≥114 (×-1)

2x≥-114

x≥-114/2

x≥57

Resposta C:

20-(7x+4)<30

20-7x-4<30

-7x<30-20+4

-7x<14 (×-1)

7x<-14

x<-14/7

x<-2