Question

Resolvendo as inequações do 1° grau:
a) 2x + 2≤ x + 6

b) 3a + 2 > a + 6

c) 2x – 15 < - x

d) 6x -5 -4x ≤ 3

e) – x – 10 > -2

f) 7(y – 1) < 5 – 2y

g) 2(b – 3) + 3(b – 1) ≤36


me ajudem pfff

Answer 1

Explicação passo a passo:

a) 2x + 2≤ x + 6

2x-x ≤ 6-2 ---> x ≤ 4

b) 3a + 2 > a + 6

3a-a > 6-2 -----> 2a>4 ----> a>2

c) 2x – 15 < - x

2x+x < 15 ----> 3x < 15 ----> x<5

d) 6x -5 -4x ≤ 3

2x ≤ 3+5=8 ---> x ≤ 4

e) – x – 10 > -2

-x>-2+10=+8 ---> x<-8

f) 7(y – 1) < 5 – 2y

7y-7<5-2y ---> 7y+2y<5+7 ----> 9y<12   ----> y<12/9=4/3

g) 2(b – 3) + 3(b – 1) ≤36 ----> 2b-6+3b-3 ≤ 36 ----> 5b-9≤36

5b≤36+9 ----> 5b≤45 -----> b≤45/5 ----> b≤9