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A=[3,08*(23+77)] + [17,12*(62+37+1)]
A=(3,08*100)+(17,12*100)
A=308+1712
A=2020
\(A=17,12\times62+3,08\times23+17,12\times37+3,08\times77+17,12\)
\(=\left(17,12\times62+17,12\times37+17,12\right)+\left(3,08\times23+3,08\times77\right)\)
\(=17,12\times\left(62+37+1\right)+3,08\times\left(23+77\right)\)
\(=17,12\times100+3,08\times100\)
\(=1712+308\)
\(=2020\)
Học tốt
\(y\times16,2+y\times17,8=795,6\)
\(\Rightarrow y\times\left(16,2+17,8\right)=795,6\)
\(\Rightarrow y\times34=795,6\)
\(\Rightarrow y=795,6:34=23,4\)
\(17,8-\left(14,904:3\cdot y-1,084\right)-2,63=13,77\)
\(\Leftrightarrow4,968\cdot y-1,084=17,8-\left(13,77+2,63\right)\)
\(\Leftrightarrow4,968\cdot y-1,084=17,8-16,4\)
\(\Leftrightarrow4,968\cdot y=17,8-16,4+1,084\)
\(\Leftrightarrow4,968\cdot y=2,484\)
\(\Leftrightarrow y=2,484:4,968\)
\(\Leftrightarrow y=0,5\)
\(17,8-\left(14,904:3.y-1,084\right)-2,63=13,77\)
\(\Leftrightarrow17,8-\left(4,968.y-1,084\right)=13,77+2,63\)
\(\Leftrightarrow17,8-\left(4,968.y-1,084\right)=16,4\)
\(\Leftrightarrow4,968.y-1,084=17,8-16,4\)
\(\Leftrightarrow4,968.y-1,084=1,4\)
\(\Leftrightarrow4,968.y=1,4+1,084\)
\(\Leftrightarrow4,968.y=2,484\)
\(\Leftrightarrow y=2,484:4,968\)
\(\Leftrightarrow y=0,5\)
Vậy y = 0,5
_Chúc bạn học tốt_
a)x-13,7=0,896
x=0,896+13,7
x=14,596
b)x-3,08=1,72+325
x-3,08=326,72
x=326,72+3,08
x=329,8
\(m\div3,08-17,8=158,2\)
\(\Leftrightarrow m\div3,08=158,2+17,8\)
\(\Leftrightarrow m\div3,08=176\)
\(\Leftrightarrow m=176\times3,08\)
\(\Leftrightarrow m=542,08\)
Vậy m = 542,08
M =(158,2 + 17,8 ) x 3,08
M =542,08