mohon bantuannya, 2 soal saja, makasih:)

jawab

17. 
4x - 7 ≥ 6x+ 5
4x - 6x ≥ 5+7
-2x ≥ 12
x ≤  -6
x = { -6,-7,-8,...}

18
K = 58
p = 5 +l

K = 2(p+l)
58 = 2(5+ l+ l)
29= (5+ 2l)
2l= 29-5
2l= 24
l= 12
p= 5+l
p= 17

Luas = pxl 
Luas = 17 x12  = 204

jawab

17)
4x -7 >= 6x +5
4x - 6x >= 5+7
- 2x >= 12
x >= 12/-2
x >= -6

x = [-6,-7,-8,...]

18)
K = 58 cm
p = 5 cm + l

K = 2(p+l)
58 cm = 2(5 cm + l + l)
58 cm = 2(5 cm + 2l)
58 cm = 10 cm + 4l
4l = 58 cm - 10 cm
4l = 48 cm
l = 48 cm / 4
l = 12 cm

p = 5 cm + l
p = 5 cm + 12 cm
p = 17 cm

maka luas
= p × l
= 17 cm × 12 cm
= 204 cm²

semoga membantu