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\(\text{x + 27,27 = 178,2}\) \(\text{x - 19,8 = 1.38 x 8}\)
\(\text{x = 178,2 - 27,27}\) \(\text{x - 19,8 = 11,04}\)
\(\text{x = 150,93}\) \(\text{x = 11,04 + 19,8}\)
\(\text{Vậy x = 150,93}\) \(\text{ x = 30,84}\)
\(\text{Vậy x = 30,84}\)
\(\left(\dfrac{3}{4}-\dfrac{1}{10}\right)\div2,5+3,26\)
\(=\dfrac{13}{20}\div2,5+3,26\)
\(=0,26+3,26\)
$=3,52$
\(3,26\cdot728+3,26+3,26\cdot270\)
\(=3,26\cdot\left(728+1+270\right)\)
\(=3,26\cdot999\)
\(=3,26\cdot\left(1000-1\right)\)
\(=3,26\cdot1000-1\cdot3,26\)
\(=3260-3,26\)
\(=3256,74\)
\(2\times x-12-x=\)\(0\)
\(\Leftrightarrow x\left(2-1\right)-12=0\)
\(\Leftrightarrow x-12=0\)
\(\Leftrightarrow x=12\)
( x + 1 ) + ( x + 2 ) + ... + ( x + 100 ) = 5750
x + 1 + x + 2 + ... + x + 100 = 5750
( x + x + ... + x ) + ( 1 + 2 + ... + 100 ) = 5750
Số số hạng là : ( 100 - 1 ) : 1 + 1 = 100 ( số )
Tổng là : ( 100 + 1 ) x 100 : 2 = 5050
=> 100a + 5050 = 5750
=> 100a = 700
=> a = 7
Tim x biet : ( x + 1 ) + ( x + 2 ) + ... + ( x + 100 ) = 5750
x . 100 + ( 1 + 2 + ... + 100) = 5750
x . 100 + 101 . 100 : 2 = 5750
x . 100 + 101 . 50 = 5750
x . 100 + 5050 = 5750
x . 100 = 700 => x = 7
\(x-\frac{2}{3}=\frac{1}{2}\)
\(x=\frac{1}{2}+\frac{2}{3}\)
\(x=\frac{3}{6}+\frac{4}{6}\)
\(x=\frac{7}{6}\)
\(\left(6,27-1,38\right)\div\left(x\div2\right)=3,26\)
\(4,89\div\left(x\div2\right)=3,26\)
\(x\div2=4,89\div3,26\)
\(x\div2=1,5\)
\(x=1,5\times2\)
\(x=3\)
Chúc bạn hok tốt !
\(\left(6,27-1,38\right):\left(x:2\right)=3,26\)
\(4,89:\left(x:2\right)=3,26\)
\(x:2=4,89-3,26\)
\(x:2=1,63\)
\(x=1,63\times2\)
\(x=3,26\)