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2x + 9x-15 - 10 = 5x+5
2x + 9x-5x =15+10+5
6x=3 :6
x=5
4x-3=3x+1
4x-3x=1+3
x=4
2(x+1)=6 2x+2=6
2x=5-2
2x=3 ::2
x= 1,5