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4X
3(A+B)
5X
E)
A+B+C
9=X+3 X=6
F)
3X=2X+6 X=6
5(B×A)
G)
2X=6 X=3
X/5
A×B×C
H)
5X=2X+3 3X=3 X=1
2X/5
I)
7X
X/7
3X/2
J)
X/4
(A+B)/2
K)
X+5
2(A-B)