2^(x+4) = 5^(x+4)
(2/5)^(x+4) = 1
(2/5)^(x+4) = (2/5)^0
x + 4 = 0
x = -4
2.....4...6...8...10...12...14...16....18
18:3=6
6+2=8 - лет Коле
1)1500*0.16=240(руб)
2)240+1500=1740(руб)
Ответ:1740рублей.
1,2×(4-3×(-5/32))+0,4×(-5,32)-5,8 = 6/5×(4+15/32)+2/5×(-5/32)-29/5 = 6/5×143/32-1/16-29/5 = 3/5×143/16-1/16-29/5 = 429/80-1/16-29/5 = -1/2 или же -0,5
3х-(8+9х)-(5х-4)=-7х;
3х-8-9х+4=-7х
3х-9х-5х+7х=8-4
-4х=4
х=-1
х-15.5+8х-(13х+16.5)=12х
х-15.5+8х-13х-16.5=12х
х+8х-13х-12х=15.5+16.5
-16х=32
х=-2
6х-(2Х+13)-(Х-7)=15Х
6х-2х-13-х+7=15х
6х-2х-х-15х=13-7
12х-6
х=0.2