1) jika 8-x = 2x+20 tentukan nilai 3x + 13
2) jika 18-3/4x=24 tentukan nilai 14-x
TOLONG BANTU YA
1) 8-x = 2x+20
8-20 = 2x+x
-12 = 3x
-4 = x
》3x + 13 = 3×(-4) + 13 = 1
2. 18 – 3/4x = 24
-3/4x = 24+18
x = 42 × -4/3
= -56
》14 – x = 14-(-56)
= 70
1. 8-×=2×+20
-×-2×=20-8
-3× = 12
X = -4
3(-4)+13=-12+13=1
2. 18-¾x=24
-¾×=24-18
-¾x = 6
x. = 6x-4/3
X= -8
14-(-8)= 22