Mathematics
Junior High
印の付いているところがわかりません、誰か教えてください、
(2) (r-1)-7(x-1)-8=0
A-7A-8= 0
(2)
(r-1+1)(x-1-8)= 0
(エ+ 311(土エ(エ-9) 30
解が 3(A1)(A-8)= 0
x=0 または x-9=0
(田)
x= 0, x =9
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わかりやすいです、ありがとうございます!!