tolong pake cara ya!!

6.2(t+4) = 4(12-t)
2t+8 = 4t-48
2t= 56
t = 28

7. 180°=x+x+x-42°
180°=3x-42°
3x=222°
x=74°  (C)

8. K = 140 m
l = 30 m
K = 2p+2l = 2p+60m = 140 m
2p = 80 m
p = 40 m (B)

9. 5(1-2x)=45
5-10x = 45
-10x =40
x = -4
x-y=10
-4-y=10
y=-14 (D)

10. (2x-3)°+x°=90°
3x-3 =90°
3x = 93°
x = 31°
2x-3 = 62-3 = 59° (B)

11. (77-32).5/9 = 25°C (B)