Question

a) 3a + 6 ≥ a - 10 b) 6x + 4x < + 8 - 14 c) 20 - 2x - 5 ≤ 11 + 8x d) 2x + 3x ≥ + 40 - 5 e) 6x - 30 -8 -4 ≥ 80

Answer 1

A)3a+6≥ a- 10. C)20-2x-5≤11+8x
= 3a-a≥-10-6. = -2x-8x≤11-20-5
= 2a≥-16. = -10x≤-14 (-1)
= a≥-16/2. = 10x≥14
= a≥-4. = x≥14/10
= x≥1,4

B)6x+4x<8-14. D)2x+3x≥40-5
= 2x<-6. =5x≥35
= x<-6/2. =x≥35/5
= x <-3. =x≥7

E)6x-30-8-4≥80
=6x≥80+30+8+4
=6x≥80+42
=6x≥122
=x≥122/6