2/3 * X : 1/5 = 1va1/3 :1/4
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1va1/3 + 1va 1/5 x y- 4/5=2va4/5
= \(\frac{4}{3}\)+ \(\frac{6}{5}\)x y - \(\frac{4}{5}\)= \(\frac{14}{5}\)
= \(\frac{8}{15}\)+ \(\frac{6}{5}\)x y = \(\frac{14}{5}\)
\(\frac{6}{5}\)x y = \(\frac{14}{5}\)- \(\frac{8}{15}\)= \(\frac{6}{15}\)
y = \(\frac{6}{15}\): \(\frac{6}{5}\)
y = \(\frac{1}{3}\)
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tim x
5/6x−3/4=−1/4+2/3
−1va1/2−2/3x=5/6−(−2/5)
(4/5:x+1,5):2/3=−1,5
4/3x−2/3=1/4−x
giup minh nhe minh dang can gap
b)0,5xx+2/3xx+2/3=7/12
c)3/5-2/15:x=1/2
d)50%xx-2va1/2=2va5/6
e)(2va4/5xx-50):2/3-51
f)(4va1/2-2xx)x3va2/3=11/15
g)02/5-(2va1/2xx-3):15=1/10
h)(3/4+x)x1/1+5va1/6-1va1/6
b)0,5xx+2/3xx+2/3=7/12
c)3/5-2/15:x=1/2
d)50%xx-2va1/2=2va5/6
e)(2va4/5xx-50):2/3-51
f)(4va1/2-2xx)x3va2/3=11/15
g)02/5-(2va1/2xx-3):15=1/10
h)(3/4+x)x1/1+5va1/6-1va1/6
13va1/3 chia 1va1/3=26 chia (2 x - 1)
tinh gia tri bieu thuc
3/4 x 8,4 +2,8 x 1va1/2
1va1/2 la hon so nha
\(\frac{3}{4}\)x 8,4 + 2,8 x \(1\frac{1}{2}\)
= 0,75 x 8,4 + 2,8 x \(\frac{3}{2}\)
= 0,75 x 8,4 + 2,8 x 1,5
= 6,3 + 4,2
= 10,5
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\(\frac{3}{4}\times8,4+2,8\times1\frac{1}{2}\)
\(=6,3+4,2\)
\(=10,5\)
Kết bạn với mình nha!
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cam on cac cau nha
thanks you very much
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Xem thêm câu trả lời
5va 1/3+2va2/5+1va1/9=
giup nha
(x-1va1/2)^2019=1/25(x-1va1/2)^2017
giup minh tra loi cau nay nha
x/2+x/3+x/4-0.6=-1va1/2