Answer:
x=126
x-30=96
Step-by-step explanation:
(x-30) +(x-30) + (x-30) + x + x =540
5x-90=540
5x=630
90% = 72 questions
\\Find 1%
1 % = 72 ÷ 90 = 0.8
\\Find 100%
100% = 0.8 x 100 = 80 questions
Answer: There were 80 questions
33%
3
