Question

Help me ;-;
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
1
2
(6x + 22y) = x + y

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

(D) 112
1
2
x + 27y = (12
1
2
x + 9y)