\(720:\left[41-\left(2\times x+5\right)\right]=8\times4\)
\(720:\left[41-\left(2\times x+5\right)\right]=32\)
\(41-\left(2\times x+5\right)=720:32\)
\(41-\left(2\times x+5\right)=22,5\)
\(2\times x+5=41-22,5\)
\(2\times x+5=18,5\)
\(2\times x=18,5-5\)
\(2\times x=13,5\)
\(x=13,5:2\)
\(x=6,75\)
Tim x biet : ( x + 1 ) + ( x + 2 ) ( x + 3 ) + ( x +4 ) + ( x + 5 ) = 4 + 5 + 6 + 7 + 8
Tim x, biet : 5/4 nhan x = 5/8 + 3/12
tim X biet: X x 2 + X x 3 + X x 4 + X x 5 + x = 2130
tim x biet
a\(\frac{3}{5}:\frac{7}{x}:\frac{3}{4}=\frac{8}{35}\)
b,\(x< \frac{7}{12}:\frac{4}{5}\)
Tim gia tri cua x biet 1/4 nhan 1/5 nhan x=1/2
tim x biet 1 / 3 x 4 + 1 / 4 x 5 + 1 / 5 x 6 + 1 / 6 x 7 = 1 / x
Tim phan so x/y biet x lon hon y la 8 don vi va x/y =5/3
tim gia tri cua x biet 1/4*1/5*x=1/2
gia tri cua x la
Tim X, biet: X x 2 + X x 3 + X x 4 + X = 100