Question

1) Resolva as inequações:
a. 3 x = 5 >11
b. 2(x+3) - 15 < -3 + 2 (+12)
c.2 x + 15 > 12
d. 4 x - 8 <8

Answer 1

1) Resolva as inequações:a. 3 x = 5 >11?????



3x + 5 > 11
3x > 11 - 5
3x >  6
x > 6/3
x > 2

b. 2(x+3) - 15 < -3 + 2 (+12)

2(x + 3) - 15 < - 3 + 2(+12)
2x + 6  - 15  < - 3 + 24
2x -  9 < + 21
2x < 21 + 9
2x < 30
x < 30/2
x < 15

c.2 x + 15 > 12

2x + 15 > 12
2x > 12 - 15
2x > - 3
x > - 3/2

d. 4 x - 8 <8

4x - 8 <  8
4x < 8 + 8
4x < 16
x < 16/4
x < 4