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`a)53,2:(x-3,5)+45,8=99`
`53,2:(x-3,5)=99-45,8`
`53,2:(x-3,5)=53,2`
`x-3,5=53,2:53,2=1`
`x=1+3,5=4,5`
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\(b)4,25\times(x+41,53)-125=53,5\)
\(4,25\times(x+41,53)=53,5+125=178,5\)
`x+41,53=178,5:4,25`
`x+41,53=42`
`x=42-41,53`
`x=0,47`
53,2:(x-3,5)+45,8=99
=> 53,2 :(x-3,5) = 99-45,8
=> 53,2 :(x-3,5) = 53,2
=> x-3,5= 53,2 : 53,2
=> x-3,5 = 1
=> x= 1+3,5
=> x= 4,5
câu còn lại tương tự nhé
\(4,25\times\left(x+41,53\right)-125=53,5\)
\(4,25\times\left(x+41,53\right)=53,5+125\)
\(4,25\times\left(x+41,53\right)=178,5\)
\(x+41,53=178,5:4,25\)
\(x+41,53=42\)
\(x=42-41,53\)
\(x=0,47\)
\(\text{53,2:[x-3,5]+45,8=99}\)
\(\text{53,2:[x-3,5] =99-45,8}\)
\(\text{53,2:[x-3,5] =53,2}\)
\(\text{ x-3,5 =53,2:53,2}\)
\(\text{ x-3,5 =1}\)
\(\text{ x =4,5}\)
\(\text{4,25x[x+41,53]-125=53,5}\)
\(\text{4,25x[x+41,53] =53,5+125}\)
\(\text{4,25x[x+41,53] =178,5}\)
\(\text{ x+41,53 =178,5:4,25}\)
\(\text{ x+41,53 =42}\)
\(\text{ x =42+41,53}\)
\(\text{ x =83,53}\)
\(53,2\div\left(x-3,5\right)+45,8=99\)
\(53,2\div\left(x-35\right)=99-45,8\)
\(53,2\div\left(x-35\right)=53,2\)
\(x-35=1\)
\(x=1+35\)
\(x=36\)
\(4,25\times\left(x+41,53\right)-125=53,5\)
\(4,25\times\left(x+41,53\right)=53,5+125\)
\(4,25\times\left(x+41,53\right)=178,5\)
\(x+41,53=178,5\div4,25\)
\(x+41,53=42\)
\(x=42-41,53\)
\(x=0,47\)
4,25 x (y - 41,53) = 53,5+125
4,25 x (y - 41,53) =178,5
y - 41,53 = 178,5 :4,25
y - 41,53 = 42
y = 42 - 41,53
y = 0,47
4,25 x (X+41,53)-125=53,5
4,25 x (X+41,53)=53,5+125
4,25x(X+41,53)=178,5
X+41,53=178,5:4,25
X+41,53=42
X=42-41,53
X=0,47
vậy...........
\(4,25\times\left(x+41,53\right)-125=53,5\)
\(4,25\times\left(x+41,53\right)=53,5+125\)
\(4,25\times\left(x+41,53\right)=178,5\)
\(x+41,53=178,5:4,25\)
\(x+41,53=42\)
\(x=42-41,53\)
\(x=0,47\)
0,47 nhe ban