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a; 100% : \(x\) - 50% : \(x\) + 40% : \(x\) = 18 + 30% : \(x\)
(100% - 50% + 40%): \(x\) = 18 + 30% : \(x\)
90% : \(x\) = 18 + 30% : \(x\)
90%: \(x\) - 30%: \(x\) = 18
60% : \(x\) = 18
\(x\) = 60% : 18
\(x\) = \(\dfrac{1}{30}\)
\(\frac{24+x}{50+x}=\frac{3}{5}\Rightarrow\left(24+x\right)\cdot5=\left(50+x\right)\cdot3\)3
hay \(120+24x=150+50x\)
suy ra 50x-24x=150-120 hay 26x = 30 \(\Rightarrow x=\frac{26}{30}\)
\(x+\frac{x}{3}+\frac{x}{2}+\frac{3}{4}=\frac{5}{3}\)
\(\Rightarrow x+\frac{x}{3}+\frac{x}{2}=\frac{5}{3}-\frac{3}{4}=\frac{11}{12}\)
\(\Rightarrow x\left(1+\frac{1}{3}+\frac{1}{2}\right)=\frac{11}{12}\)
\(\Rightarrow x.\frac{11}{6}=\frac{11}{12}\)
\(\Rightarrow x=\frac{11}{12}:\frac{11}{6}=\frac{11}{12}.\frac{6}{11}\)
\(\Rightarrow x=\frac{1}{2}\)
x + \(\frac{x}{3}\)+\(\frac{x}{2}\)+ \(\frac{3}{4}\)=\(\frac{5}{3}\)
x*1+ x*\(\frac{1}{3}\)+x*\(\frac{1}{2}\) = \(\frac{5}{3}-\frac{3}{4}\)
x *( 1+\(\frac{1}{3}\)+\(\frac{1}{2}\)) = \(\frac{11}{12}\)
x* \(\frac{11}{6}\) = \(\frac{11}{12}\)
x = \(\frac{11}{12}:\frac{11}{6}\)
x = \(\frac{1}{2}\)
Vậy \(x=\frac{1}{2}\)
abc:(a+b+c)=100
aba=(a+b+c)x100
abc=a x100+bx100+cx100
ax100+bx10+c=ax100+bx100+cx100
( đề có vẻ sai )
abc:(a+b+c)=100
aba=(a+b+c)x100
abc=a x100+bx100+cx100
ax100+bx10+c=ax100+bx100+cx100
( đề có vẻ sai ) Nếu bn cảm thấy đúng thì k cho mình nhé!Học Tốt
+x/3=24
=> x+ x*1/3 =24
=> x*1 +x *1/3=24
=> x* (1+1/3) =24
=> x* 4/3 =24
=> x= 24 :4/3
=> x= 24 * 3/4
=> x=18
x.8+56+x.4-28=x.3+9+x+4*(1-3)
=>12x+(56-28)=(3x+x)+9+4*(-2)
=>12x+28=4x+9-8=4x+1
=>12x-4x=1-28
8x=-27
x=-27/8
X x 3 + 479 = 498,02
X x 3 = 498,02 - 479
X x 3 = 19,02
X = 19,02 : 3
X = 6,34
Vậy X = 6,34