A number can be used only once – [ ] + 7 x [ ] – 8 / 4 + 2 x [ ] – 9/3= 18
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Step-by-step explanation:
– [ 1] + 7 x [2 ] – 8 / 4 + 2 x [ 5] – 9/3= 18
-1+14-2+10-3= 18
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