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2x+8x-6=10
10x=10+6
10x= 16/10
x=1,6
3x(2x+1)=6x^2+7
6x^2+3x=6x^2+7
6x^2-6x^2 + 3x = 7
3x=7/3
x=2,(3)
3x+2/2x+1+1/5 / * 10 1/5 = 0,2
30x + 10* 2/2x + 10 * 1/5
30x + 10x + 2
40 x + 2
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