x + (8-x) = 8
+ (13-x) - (7-x) = 6
=13 =8
(8-x) + (7-x) = 8
15-2x = 8
-2x = -7
A.
x = 3.5
(top left)
B.
x = 4.5
( top right)
C.
13 - 3.5 = 9.5
(bottom left)
D.
7 - 3.5 = 3.5
(bottom right)
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