tổng là 

50 x 2=100

số bé là

100:(3+1)x1=25

số lớn là

25x3=75

              đáp số :25

                         75

Thùng to và thùng bé có số lít dầu là:

21+15=36(l)

Có số chai là:

36:0,75=48(chai)

           Đáp số: 48 chai

    90 + 100 + 10

=  190 + 10

=   200

Vậy 90 + 100 + 10 = 200 

Giải:

Ta có: 17x² - 805x + 1800 = 0

⇔ 17x² - 765x - 40x + 1800 = 0

⇔ 17x(x - 45) - 40(x - 45) = 0

⇔ (x - 45)(17x - 40) = 0

⇔\(\left[{}\begin{matrix}x-45=0\\17x-40=0\end{matrix}\right.\text{⇔}\left[{}\begin{matrix}x=45\\x=\frac{40}{17}\end{matrix}\right.\)

Vậy phương trình có tập nghiệm là S = {\(45;\frac{40}{17}\)}

Chúc bạn học tốt@@

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chiu roi

ban oi

tk nhe@@@@@@@@@@@@

xin do

ai tk minh minh tk lai

tổng số gà cua bà và Nga là:

24+12=36(con gà)

Đáp số:36 con gà

TA CÓ:

a:b=c

a:c=5

=>b=5

cho nao k hiu thi hoi nha

kkkkkkkkkkkkkkkkkkkkkkkk minh nha