pake cara yaa? terima kasih yg sudang membantu....

3). (x-(-10)) / (190-(-10)) = (50-0) / (100-0)
(x+10) / (190+10) = 50 / 100
(x+10) / 200 = 50 / 100
100.(x+10) = 50 . 200
100x + 1000 = 10000
100x = 10000-1000
100x = 9000
x = 90°x

4). (y-(-2)) / (178-(-2)) = (60-0) / (80-0)
(y+2) / (178+2) = 60 / 80
(y+2) / 180 = 60 / 80
80.(y+2) = 60 . 180
80y + 160 = 10800
80y = 10800 - 160
80y = 10640
y = 133°y