Question

me ajudem por favor
i) 3 (2×+1)>15
j) 5×-3 (×+2)<2
k) 7 (2×-3)>10 (×-2)
l) 5×-4 (×+3)<3-2×
alguém?

Answer 1

Vamos lá

i) 3(2x + 1) > 15

6x + 3 > 15

6x > 12,  x > 2

j) 5x -3(x + 2) < 2

5x - 3x - 6 < 2

2x < 4,   x < 2

k) 7(2x - 3) > 10(x - 2)

14x - 21 > 10x - 20

4x > 1, x > 1/4

l) 5x - 4(x + 3) < 3 - 2x

5x - 4x -  12 < 3 - 2x

5x - 4x + 2x < 15

3x < 15,  x < 5