Mathematics (maths)5

1. 4 times x plus 5 times y.
中文:4乘x加5乘y
答案:4x X 5y (X係乘號)

2. the sum of p and 2times q is divided by3 times r.
中文: p和 2乘q 的總和 除以 3乘r
答案: (p+2q)/3r (/係除號)

3. when 3 is added to the product of 2 and a number , the result is 11 . find the number
中文:當 2乘以一個數字之後 再加上3 ,答案是11 ,請找出該數字
答案: (x X 2)+3 = 11
x X 2 =11-3
x = 4