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Mathematics, 26.08.2019 22:00 nikki225

Ihave 2 questions 1 is what is z if 3[z=7]=-12 and number 2 what is y if [4-2y]+5=9

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Ihave 2 questions 1 is what is z if 3[z=7]=-12 and number 2 what is y if [4-2y]+5=9...
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