what is x if x + 3 y = 33 and y = 10 ?
"substitute y by 10 in x + 3 y = 33 x + 3 ( 10 ) = 33 x + 30 = 33 if we substitute x by 3 in x + 30 = 33 , we have 3 + 30 = 33 . hence x = 3 correct answer c"
subtract(33, multiply(3, 10))