10x+x-9+x=8x-5
10x+x+x-8x=9-5
12x-8x=-4
4x=4
x=4/4=1
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10x+x+x-8x=9-5
4x=4
x=4:4
x=1
10x+x-9+x=8x-5
10x+x+x-8x=9-5
12x-8x=-4
4x=4
x=4/4=1