18-(×-4)=9+(×+3)
= 18 – X + 4 = 9 + X + 3
= 22 – X = 12 + X
= -X-X = 12-22
= -2X = -10
= X = -10/-2
X = 5
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18-(×-4)=9+(×+3)
= 18 – X + 4 = 9 + X + 3
= 22 – X = 12 + X
= -X-X = 12-22
= -2X = -10
= X = -10/-2
X = 5