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Mathematics
Junior High
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この問題の解き方と答えを教えて下さい！

(5) 5 1 2x + 7 4 = 10x 5 4

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Clearnote - What Can You Do・How to Use

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qwerty
qwerty

Point.両辺に4をかける
→ 10x+1=40x-5
10x-40x=1-5
-30x =-4
30x =4
x =4/30
=2/15

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