5. 2х+15=3х-11
2х-3х=-11-15
-х=-26
х=26
7-5х=х-2
5х-х=-2-7
4х=-9
х=-9/4
2(х-3)=3(2-х)
2х-6=6-х
2х+х=6+6
3х=12
х=4
-3(4-х)=2(х-5)
-12+3х=2х-10
3х-2х=-10+12
х=2
<span> 1) log5х=2/3
х=5</span>²/³
х=³√25<span>
2) log2х=0.6 0,6=6/10=3/5
</span> log2х=3/5
х= 2³/⁵
х=⁵√8
5%=0,05
0,05*х=40
5х=4000
х=800
Ответ: 800
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X^2-25/x+5 = (x-5)(x+5)/x+5 = x-5 = -5-5=-10