7-8x=9-10x7-8x=9-18x+10x=7+918x=1618x/18=16/18x≈0.89o(︶︿︶)o 唉\("▔□▔)/
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![7-8x=9-10x7-8x=9-18x+10x=7+918x=1618x/18=16/18x≈0.89o(︶︿︶)o 唉\(](/uploads/image/z/1638240-24-0.jpg?t=7-8x%3D9-10x7-8x%3D9-18x%2B10x%3D7%2B918x%3D1618x%2F18%3D16%2F18x%E2%89%880.89o%28%EF%B8%B6%EF%B8%BF%EF%B8%B6%29o+%E5%94%89%5C%28%22%E2%96%94%E2%96%A1%E2%96%94%29%2F)
7-8x=9-10x7-8x=9-18x+10x=7+918x=1618x/18=16/18x≈0.89o(︶︿︶)o 唉\("▔□▔)/
7-8x=9-10x
7-8x=9-1
8x+10x=7+9
18x=16
18x/18=16/18
x≈0.89
o(︶︿︶)o 唉
\("▔□▔)/
7-8x=9-10x7-8x=9-18x+10x=7+918x=1618x/18=16/18x≈0.89o(︶︿︶)o 唉\("▔□▔)/
7-8x=9-10x
10x-8x=9-7 移项要变号
2x=2
x=2/2
x=1
望采纳
解;2x=2 x=1
7-8x=9-10x
-8x+10x=9-7
2x=2
x=1