=log^7(3x+8) log^11(x^2-3x) =log11^(x^2-36) log^2x=-log^0.5(10-x) 2*log^36(2x-7) =log^6(14-x) help Log^7(x+18) please

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1) ODZ: x+18gt; 0, 3x+8gt; 0 x ∈ (-3/8;+ ∞) log7(x+18) =log7(3x+8) x+18=3x+8 2x=10 x=5 (enters ODZ) 2)ODZ: x^2-3xgt; 0, x^2-36gt; 0 x ∈ (-∞;-6) ∪ (6;+ ∞) log11(x^2-3x) =log11(x^2-36) x^2-3x=x^2-36 3x=36 x=12 (enters ODZ) 3)ODZ: xgt; 0, 10-xgt; 0 x ∈ (0;10) log2 (x)=-log0.5(10-x) log2(x) =log2(10-x) x=10-x of x=5 (enters ODZ) 4)ODZ: 2x-7gt; 0, 14-xgt; 0 x ∈ (7/2;14) 2*log36(2x-7) =log6(14-x) log6(2x-7) =log6(14-x) 2x-7=14-x 3x=21 x=7 (enters ODZ )
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