Answer:
x = 30
Step-by-step explanation:
3x - 57 + 4x + x - 3 = 180 [angle sum of triangle]
x = 30
24% of 80 is 19.2
120% of 70 is 84
20% of 150 is 30
0.8% of 150 is 1.2
120% of 85 is 102
Step-by-step explanation:
picture is not clear but I guess 2,-2
128/100=32/25
..................
We have similar triangles so
12/x = (12+78)/(x+13)
We can skip some algebra by doing the ratio on the pieces. We'll show it works at the end.
12/x = 78/13
x = 12(13)/78 = 2
We check
12/2 = 6
(12+78)/(2+13) = 90/15 = 6, good
Answer: x=2
