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\(x\times6,5+140=630,1\)
\(x\times6,5=630,1-140\)
\(x\times6,5=490,1\)
\(x=490,1:6,5\)
\(x=75,4\)
107,8 - x : 9,5 = 29,2
x : 9,5 = 107,8 - 29,2
x : 9,5 = 78,6
x = 78,6 x 9,5
x = 746,7
(45,4 + x) : 17,5 = 8,4
(45,4 + x) = 8,4 x 17,5
45,4 + x = 147
x = 147 - 45,4
x = 101,6
a)x*6.5=630.1-140
x*6.5=490.1
x=490.1/6.5
x=75.4
b)x/9.5=107.8-29.2
x/9.5=78.6
x=78.6*9.5
x=746.47
a: \(\Leftrightarrow x\cdot\dfrac{4}{5}=216\)
hay x=270
\(2,5\) x \(9,5\) x \(4+20\) x \(9,5\) x \(0,5\) +\(9,5\) x \(8\) x \(1,25\)
\(=9,5\) x ( \(2,5\) x \(4+20\) x \(0,5\) + \(8\) x \(1,25\) )
\(=9,5\) x \(30\)
\(=285\)
\(9,5\times3,7+9,5\times1,3+9,5:0,25+9,5\)
\(=9,5\times3,7+9,5\times1,3+9,5\times4+9,5\)
\(=9,5\times\left(3,7+1,3+4+1\right)\)
\(=9,5\times10\)
\(=95\)
a)x-20/100.x=216
x.(1-0,2)=216
x.0,8=216
x=216:0,8
x=270
b)107,8-x:950/100=29,2
x:9,5=107,8-29,2
x:9,5=78,6
x=78,6.9,5
x=746,7
a, ( x . 0,25+1999).2000=(53+1999).2000
=> 500x + 1999 . 2000 = 53 . 2000 + 1999 . 2000
=> 500x = 53 . 2000 + 1999 . 2000 - 1999 .2000
=> 500x = 53 . 2000
=> x = 53 . 2000 : 500
=> x = 53 . 4
=> x = 212
\(x\)x 6,5+ 140= 630,1.
\(x\)x 6,5= 630,1- 140.
\(x\)x 6,5= 490,1.
\(x\)= 490,1: 6,5.
\(x\)= 75,4.
Vậy \(x\)= 75,4.
b) 107,8- \(x\): 9,5= 29,2.
\(x\): 9,5= 107,8- 29,2.
\(x\): 9,5= 78,6.
\(x\)= 78,6x 9,5.
\(x\)= 746,7.
Vậy \(x\)= 746,7.
\(6,5x+140=630,1\)
\(6,5x=630,1-140\)
\(6,5x=490,1\)
\(x=75,4\)
\(\frac{107,8-x}{9,5}=29,2\)
\(\Rightarrow107,8-x=277,4\)
\(\Rightarrow x=-169,6\)
vậy \(x=-169,6\)