20 is obtained when 4 is subtracted from the product of x and 7 is??
20 is obtained when 4 is subtracted from the product of x and 7 means:
20 = x ∙ 7 - 4
7 x - 4 = 20
Add 4 to both sides
7 x = 24
x = 24 / 7
7x-4=20
7x=20+4
7x=24
x=24/7
x=3 3/7