cheyenne547
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  • 10-09-2021
  • Mathematics
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Solve -7<3x+2<5
(Multiple choice, picture added)

Solve 7lt3x2lt5 Multiple choice picture added class=

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Аноним Аноним
  • 10-09-2021

[tex]\\ \sf\longmapsto -7<3x+2\leqslant5[/tex]

  • Substract 2 from all sides

[tex]\\ \sf\longmapsto -7-2<3x+2-2\leqslant 5-2[/tex]

[tex]\\ \sf\longmapsto -9<3x\leqslant 3[/tex]

  • Divide all sides by 3

[tex]\\ \sf\longmapsto \dfrac{-9}{3}<\dfrac{3x}{3}\leqslant \dfrac{3}{3}[/tex]

[tex]\\ \sf\longmapsto -3<x\leqslant 1[/tex]

Option A is correct

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