lg(x-1)+lg(x-3)=lg(1,5x-3)
x-1+x-3=1,5x-3
x+x-1,5x=-3+1+3
2x-1,5x=1
0,5x=1
x=1:0,5
x=2
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lg(x-1)+lg(x-3)=lg(1,5x-3)
x-1+x-3=1,5x-3
x+x-1,5x=-3+1+3
2x-1,5x=1
0,5x=1
x=1:0,5
x=2