Answer:
x=10
Step-by-step explanation:
20=x+(2x8)-6
20=x+16-6
20=16x-6
20=10x
l
75% of students are year 7
divide 126 by 168 which equals 75% of year 7 pupils
84.5-19.7= 67.8
67.8÷6= 11.3
11.3 yards per curtain
