Answer:
19
Step-by-step explanation:
7x-8=6x+11
-6x -6x
x-8=11
+8 +8
x=19
I believe it's A.
Answer
here
A={a,b,c,d}
B={c,d,e,f}
C={x,y,z}
A-B={e,f}
the answer is 4
if y=21 the we substitute in the main equation
21=8x-11
8x=32
x=4
55%
Percentage of regular coffees = × 100%
= 55%