Question

Enter a number in each box so that the expressions are equivalent.

(A) 0.8 (2x + x) + 3(7 - 4.1x) =
x + 21

(B) 12
(6x + 22y) =
x +
y

(C) (3x -
) - (6x + 1) = -3x - 2

(D) 112
x + 27y =
(12
x + 9y)