\(6\left(x+7\right)+2\left(x+11\right)-5x=83\)
\(\Leftrightarrow42+6x+22+2x-5x=83\)
\(\Leftrightarrow6x+2x-5x+\left(42+22\right)=83\)
\(\Leftrightarrow3x+64=83\)
\(\Leftrightarrow3x=83-64\)
\(\Leftrightarrow3x=19\)
\(\Leftrightarrow x=\frac{19}{3}\)
Vậy ...........
Tim x:
118,24-( x÷ 5+ x ×3)=27,12×2
Viet ro loi giai nhe!
Tinh nhanh [1/1*3+1/3*5+1/5*7+1/7*9+1/9*11]*y=2/3
Giai ro rang ho minh nhe
a,\(\dfrac{1}{7}\text{x}\dfrac{2}{7}+\dfrac{1}{7}\text{x}\dfrac{5}{7}+\dfrac{6}{7}\) b,\(\dfrac{6}{11}\text{x}\dfrac{4}{9}+\dfrac{6}{11}\text{x}\dfrac{7}{9}-\dfrac{6}{11}\text{x}\dfrac{2}{9}\)
c, \(\dfrac{4}{25}\text{x}\dfrac{5}{8}\text{x}\dfrac{25}{4}\text{x}24\)
Tính bằng cách thuận tiện nhất:
a) 16, 2 x 3, 7 + 5, 7 x 16, 2 - 7, 8 x 4, 8 - 4, 6 x 7, 8 : 11, 2 + 12, 3 + 13, 4 - 12, 6 - 11, 5 - 10, 4
Tính giá trị biểu thức:
(\(\dfrac{6}{11}+\dfrac{5}{11}\)) x \(\dfrac{3}{7}\) \(\dfrac{3}{5}x\dfrac{7}{9}-\dfrac{3}{5}x\dfrac{2}{9}\) \(\left(\dfrac{6}{7}-\dfrac{4}{7}\right):\dfrac{2}{5}\)
1. Tính
a) 5/7 x 4 : 5/9
b) 8 x 2/3 : 1/2
c) 6 : 3/5 - 7/6 x 6/7
21/5 x 10/11 + 57/11
2. Tìm x
a) 35/9 : x = 35/6
b) (1/1x2 + 1/2x3 + 1/3x4 +1/4x5 +1/5x6) x 10- x = 0
Tim x
11 * ( x - 6) = 4 * x + 11
Nho lam cho minh nhe
Tính giá trị biểu thức
( 6 : 3/5 - 1 1/6 x 6/7 ) : ( 4 1/5 x 10/11 + 5 2/11 )
Tìm giá trị của 11 x 10 - 10 x 9 + 9 x 8 - 8 x 7 + 7 x 6 - 6 x 5 + 5 x 4 - 4 x 3 + 3 x 2 - 2 x 1.
