Tìm y, biết:
a. y + 30%y = -1,3
b. y - 25%y = 1/2
c. 3/1/3y + 16/3/4 = -13,25
Các bạn cố gắng giúp mik nha!
(Còn kí hiệu 3/1/3 có nghĩa là 3 và 1 phần 3, còn mấy câu khác thì tự hiểu)
Những câu hỏi liên quan
Tìm y:
a, y+30%y= -1,3
b, y-25%y=1/2
c, 3+1/3y+16+3/4= -13,25
tìm y biết
a) y+30%y=-1,3
b) y-25%y+1/2
c) 3/1/3y++16/3/4=13,25
ai dải nhanh mình tick cho
1. tìm y, biết:
a, y+30%y=-1,3 B, y-25%=1 phần 2 c,3 và 1 phần 3 y+ 16 và 3 phân 4= -13,25
1. Tìm y, biết: (a + b/c.y tức là hỗn nhân y ạ)
a) y + 30 = -1,3
b) y - 25%y = 1/2
c) 3+1/3y + 16+3/4 = -13,25
2. Tính một cách hợp lí:
5/22 + 3/13 - 1/2 tất cả trên 4/13 - 2/11 + 3/2
Mong mọi người giúp mình nhé
Tìm y:
y+ 30%.y= -1,3
y- 25%.y= 1\2
3 1\3. y + 16 3\4= -13,25
3 1\3 và 16 3\4 là hỗn số
tìm y ,biết:
a , y+30%y=-1,3
b, y-25%y=1/2
c, 31/3y+163/4=-13,25
a, y + 30%y = -1,3
1.y + 30/100y = -13/10
1.y + 3/10y = -13/10
(1 + 3/10). y = -13/10
13/10 .y = -13/10
y = -13/10 : 13/10
y = -13/10 . 10/13
y = -1
b, y - 25%y = 1/2
1.y - 25/100.y = 1/2
1.y - 1/4.y = 1/2
(1 - 1/4) y = 1/2
3/4 .y = 1/2
y = 1/2 : 3/4
y = 1/2 . 4/3
y = 2/3
câu c mik chưa nghĩ ra
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tìm y , biết
a, y+30%y=-1,3
b,y-25%y=1 phần 2
c 3 1phần 3y +16 3 phần 4 = 13,25
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tìm y , biết
a, y+30%y=-1,3
b,y-25%y=1/2
c 3\(\frac{1}{3}\)y +16\(\frac{3}{4}\) = 13,25
a)\(y+30\%y=-1,3\Rightarrow y+\frac{3}{10}y=-1,3\Rightarrow y\left(1+\frac{3}{10}\right)=-1,3\Rightarrow y\times1,3\)\(=-1,3\Rightarrow y=-1\)
b)\(y-25\%y=\frac{1}{2}\Rightarrow y-\frac{1}{4}y=\frac{1}{2}\Rightarrow y\left(1-\frac{1}{4}\right)=\frac{1}{2}\Rightarrow y\times\frac{3}{4}=\frac{1}{2}\Rightarrow y=\frac{1}{2}:\frac{3}{4}\Rightarrow y=\frac{2}{3}\)
c)\(3\frac{1}{3}y+16\frac{3}{4}=13,25\Rightarrow\frac{10}{3}y+\frac{67}{4}=\frac{53}{4}\Rightarrow\frac{10}{3}y=\frac{53}{4}-\frac{67}{4}\Rightarrow\frac{10}{3}y=\frac{-7}{2}\Rightarrow y=\frac{-21}{20}\)
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Xem thêm câu trả lời
Tìm y biết:
a) y+30% y = -1/3
b) y- 25%y = 1/2
c) 3/1/3 ( đây là hỗn số) + 16/3/4= -13,25