y = 8.2+ 2.8

y = 11

y = 5 x 3.4

y = 17

a, y= 8,2 + 2,8 =11

b, y = 5 x 3,4 =17

a, 2,4*y= 6/5*0,4

2,4*y=0,48

y= 0,48 : 2,4

y= 0,2

còn câu b) nữa bạn

a: Đề thiếu vế phải rồi bạn

b: \(\overline{1y32}+\overline{7y8}+\overline{4y}=\overline{200y}\)

=>\(1000+100y+32+700+10y+8+40+y=2000+y\)

=>\(111y+1780=y+2000\)

=>110y=220

=>y=2

A) y = 175,6 : 12,5 = 14,048

B) y = 141,4 x 8,4 = 1187,76

a) 175,6 : y =12,5

=> y = 175,6 : 12,5 

=> y = 14,048

b) y : 8,4 = 141,4

=> y = 141,4 x 8,4

=> y = 1187,76

\(7,75-\left(0,5\times y\div5-6,2\right)=5\)

\(0,5\times y\div5-6,2=7,75-5=2,75\)

\(0,5\div5\times y-6,2=2,75\)

\(0,1\times y=2,75+6,2=8,95\)

\(\dfrac{1}{10}y=8,95\)

\(y=8,95\times10=89,5\)

\(y\div6\times7,2+1,3\times y+y\div2+15=19,95\)

\(1,2\times y+1,3\times y+0,5y=19,95-15=4,95\)

\(y\left(1,2+1,3+0,5\right)=4,95\)

\(2y=4,95\)

\(y=4,95\div2=2,475\)

a) (y - 24) : 28 = 20

y - 24 = 20 x 28

y - 24 = 560 

y = 560 + 24 

y = 584

vậy y = ...

a. 

\(\left(y-24\right):28=20\)

\(\left(y-24\right)=560\)

\(y=584\)

b. \(13\times\left(y-6\right)=4\times y-6\)

\(13\times y-78=4\times y-6\)

\(9\times y=72\)
\(y=8\)
c.\(y\times3+y\times4+y:3+y:4=182\)

\(y\times\left(3+4\right)+y:\left(3+4\right)=182\)

\(y\times\left(7+\dfrac{1}{7}\right)=182\)

\(y=\dfrac{637}{25}\)

tham khảo

\(0,1+y:0,5=2,4\\ \Rightarrow y:0,5=2,3\\ \Rightarrow y=1,15\)

y : 0,5 = 2,4 - 0,1
y : 0,5 = 2,3
y = 2,3 x 0,5
y = 1,15

\(a,y+\dfrac{2}{3}=\dfrac{5}{2}\)

\(y=\dfrac{5}{2}-\dfrac{2}{3}\)

\(y=\dfrac{15}{6}-\dfrac{4}{6}\)

\(y=\dfrac{11}{6}\)

\(b,3\dfrac{4}{5}-y=\dfrac{18}{5}\)

\(y=3\dfrac{4}{5}-\dfrac{18}{5}\)

\(y=\dfrac{19}{5}-\dfrac{18}{5}\)

\(y=\dfrac{1}{5}\)

\(c,y-4\dfrac{5}{6}=2\dfrac{1}{6}+\dfrac{5}{6}\)

\(y-\dfrac{29}{6}=\dfrac{13}{6}+\dfrac{5}{6}\)

\(y-\dfrac{29}{6}=\dfrac{18}{6}\)

\(y=\dfrac{18}{6}+\dfrac{29}{6}\)

\(y=\dfrac{47}{6}\)