Answer:
x - 11 = 9
+11 +11
x = 20
Step-by-step explanation:
20=x
x-11=9
if you switch the equation its 11+9=x
11+9= 20
20-11=9
28%
Step-by-step explanation: A
B) 24
A right triangle is 90°
90-42=48
48/2=24
