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x : 100 + 0.99 x x = 0.5
x x 0.01 + 0.99 x x = 0.5
x x ( 0.01 + 0.99 ) = 0.5
x x 1 = 0.5 x 1
x = 0.5
đề chính xác là
a/ \(13-2\times\left(36-5\times x\right)=1\)
b/ \(53-10\times\left(40-7\times x\right)=3\)
c/ \(\frac{3}{4}-\frac{1}{6}\div x=0,375\)
x\(\times\)(1,5+1,5+1,5+1,5+3)=99
x\(\times\)9=99
x=99\(\div\)9(tìm thừa số)
x=11
Ai tích mình mình tích lại cho.
\(x\cdot4+\frac{1}{2}\cdot x=55,35\)
\(=x\left(4+\frac{1}{2}\right)=55,35\)
\(=x\cdot4,5=55,35\)
\(\Rightarrow x=55,35:4,5\)
\(\Rightarrow x=12,3\)
\(x.4+\frac{1}{2}.x=55,35\)
\(\Leftrightarrow x.\left(4+\frac{1}{2}\right)=55,35\)
\(\Leftrightarrow x.\frac{9}{2}=55,35\)
\(\Leftrightarrow x=55,35:\frac{9}{2}\)
\(\Leftrightarrow x=\frac{123}{10}=12,3\)
(Tíck cho mìk vs nha!)
\(\left(236,4\times10,2-46,25:5\right)\times\left(24,1\times4-48,2:5\right)\)
\(=\left(236,4\times10,2-46,25:05\right)\times\left(96,4-96,4\right)\)
\(=\left(236,4\times10,2-46,25:05\right)\times0\)
\(=0\)
\(62,92:5,2-4,2\times\left(7-6,3\right)\times3,67-1,21\)
\(=62,92:5,2-4,2\times0,7\times3,67-1,21\)
\(=12,1-10,7898-1,21\)
\(=0,1002\)
\(0,175:0,25\times4-1,09\)
\(=0,7\times4-1,09\)
\(=2,8-1,09\)
\(=1,71\)
Ta có; \(90\%\times x+\frac{3}{4}\times x=45\)
\(\frac{9}{10}\times x+\frac{3}{4}\times x=45\)
\(\left(\frac{9}{10}+\frac{3}{4}\right)\times x=45\)
\(\left(\frac{36}{40}+\frac{30}{40}\right)\times x=45\)
\(\frac{33}{20}\times x=45\)
\(x=45:\frac{33}{20}\)
\(x=\frac{45.20}{33}\)
\(x=\frac{300}{11}\)
x\(\times\)(5,5+2,2+10,10+3,3)=20,10
x\(\times\)20,10=20,10
x=20,10\(\div\)20,10=1
Ai tích mình mình tích lại cho.
\(X\cdot4+0,5\cdot X=55,35\)
\(X\cdot\left(4+0,5\right)=55,35\)
\(X\cdot4,5=55,35\)
\(X=55,35:4,5\)
\(X=12,3\)