TA có:
\(\frac{y+5}{7-y}=\frac{2}{-5}\)
<=>-5(y+5)=2(7-y)
<=>-5y-25=14-2y
<=>-2y+5y=-25-14
<=>3y=39
<=>y=13
Đúng 0
Bình luận (0)
Các câu hỏi tương tự
so nguyen y thoa man y+5 phan 7-y= 2 phan 5 la
Cho x;y la so nguyen sao cho | x | + | y | = 5. So cap so nguyen ( x;y ) thoa man la
so cap x;y nguyen thoa man x>y va x/5=7/y la giup mik nhe mik tik cho !
so nguyen y thoa man y-5/7-y= 2/-3
so cap so nguyen x,y thoa man 5/x-y/3=1/6 la
cho x ; y la cac so nguyen to sao cho gia tri tuyet doi cua x cong gia tri tuyet doi cua y bang 5 so cap so nguyen (x;y) thoa man la
so cap so nguyen x,y thoa man dieu kien 3/x+y/3=5/6 la ... cap
so nguyen y thoa man \(\frac{y+5}{7-y}=\frac{2}{-5}là\)
cho 2 so x;y la cac so nguyen sao cho :/x/ +/y/ = 2 so cap (x;y) thoa man la