Mathematics
Junior High
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皆さんに質問です!
x=ー2,y=3分の1
①3(x-7y)-4(2xー3y)
のやり方教えてください!

Answers

✨ Best Answer ✨

3(x-7y)-4(2x-3y)
=3x-21y-8x+12y
にして、
-5x-9y
にしてからx=-2,y=3分の1を代入して
-5×(-2)-9×3分の1
=10-3
=7
になると思うよ!!

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