\(\frac{3}{4}\times\frac{15}{26}+\frac{1}{5}=\frac{329}{520}\left(kg\right)\)

28 x a + 22 x a = a x (28 + 22) = a x 50 = 5 x 50 = 250

ap dung bất đẳng thức tam giac

xét tam giac ABCcó CA+CB>AB

BA+BC>CA

x=2

5^x+5^x+2=650

5^x(1+25)=650

5^x26=650

5^x=650:26

5^x=25

=>5^x=5^5

x=5

/5x-4/=/x+2/

5x-4=+-(x+2)

5x-4=x+2

5x-x=2+4

4x=6

x=3/2

+5x-4=-x-2

5x+x=-2+4

6x=2

x=1/3