Tìm y:
a)y–(4,56 + 6,7) = 7,89
b) 45,32 –(y+ 12,34) = 17,65
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a)y+23,93=41,54-12,37 b)72,75-(y+13,26)=34,38 c)y-13,5=19,3+8,57
y+23,93=53,91 (y+13,26)=72,75-34,38 y-13,5=27,87
y =53,91-23,93 (y+13,26)=29,98 y =27,87+13,5
y =29,98 y =29,98-13,26 y =41,37
y =16,72
d)y+15,3=57,38-24,4 e)y-(4,56+6,7)=7,89 g)45,32-(y+12,34)=17,65
y+15,3=32,98 y-11,26 =7,89 (y+12,34)=45,32-17,65
y =32,98-15,3 y =7,89+11,26 (y+12,34)=27,67
y =17,68 y =19,15 y =27,67-12,34
y =15,33
Hok tốt!
@Kaito Kid
a) y=1,8:0,75=2,4
b) y=0,483:0,15=3,22
c) y=2,7+(3,48:1,45)=5,1
d) y=(0,125+0,5):0,25=0,7
\(a,y\times2,8+5,2\times y=48\\ y\times\left(2,8+5,2\right)=48\\ y\times8=48\\ y=\dfrac{48}{8}=6\\ ---\\ b,y\times12,25-y+y\times2,75=1050\\ y\times\left(12,25-1+2,75\right)=1050\\ y\times14=1050\\ y=\dfrac{1050}{14}=75\)
a: \(y\cdot2,8+y\cdot5,2=48\)
=>\(y\left(2,8+5,2\right)=48\)
=>\(8y=48\)
=>\(y=\dfrac{48}{8}=6\)
b: \(y\cdot12,25-y+y\cdot2,75=1050\)
=>\(y\left(12,25-1+2,75\right)=1050\)
=>\(y\cdot14=1050\)
=>\(y=\dfrac{1050}{14}=75\)
\(a,y\times27+y\times30+y\times44-y=10500\\\Rightarrow y\times\left(27+30+44-1\right)=10500\\ \Rightarrow y\times100=10500\\ \Rightarrow y=10500:100\\ \Rightarrow y=105\\ b,y\times285+115\times y=400\\ \Rightarrow y\times\left(285+115\right)=40\\ \Rightarrow y\times400=400\\ y=400:400\\ \Rightarrow y=1\)
\(a,\Rightarrow y\times\left(27+30+44-1\right)=10500\\ \Rightarrow y\times100=10500\\ \Rightarrow y=105\\ b,\Rightarrow y\times\left(285+115\right)=400\\ \Rightarrow y\times400=400\\ \Rightarrow y=1\)
Tìm y:
\(a,y+847\times2=1953-74\\ y+847\times2=1879\\ y+1694=1897\\ y=1897-1694\\ y=185\\ b,y:\left(7\times18\right)=5839+8591\\ y:126=14430\\ y=14430\times126\\ y=1818180.\)