X+x:5 x\(\frac{15}{2}\) X:2x9 = 315
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X+X/5 x 15/2+X/2.9=315
=>X+3X/2+9X/2=315
=>X+12X/2=315
=>X+6X=315=>7X=315=>X=45
\(x+x:0,5\times7,5+x:2\times9=315\)
\(x\times\left(1+1:0,5\times7,5\right)+x\times\left(1:2\times9\right)=3,15\)
\(x\times16+x\times4,5=315\)
\(x\times\left(16+4,5\right)=315\)
\(x\times20,5=315\)
\(x=315:20,5\)
\(x=15\)
a) \(\frac{2}{3}:\frac{2}{3}\times x=1\)
\(1\times x=1\)
x = 1
b) \(x+x:5\times7,5+x:2\times9=315\)
\(x+x\cdot\frac{1}{5}\cdot7,5+x\cdot\frac{1}{2}\cdot9=315\)
\(x\cdot\left(1+\frac{1}{5}.7,5+\frac{1}{2}.9\right)=315\)
x.7 = 315
x = 45
Dấu . là dấu nhân nha
Tìm x :
a) 2/3 : 2/3 × X = 1
1 × X = 1
X = 1 : 1
X = 1
b) X + X : 5 × 7,5 + X : 2 × 9 = 315
X + X × 1/5 × 7,5 + X × 1/2 × 9 = 315
X × 1 + X × 1,5 + X × 4,5 = 315
X × ( 1 + 1,5 + 4,5 ) = 315
X × 7 = 315
X = 315 : 7
X = 45
VẬY X = 45
x+x:5*7,5+x:2 *9=315
x*1+x*1,5+x*4,5=315
x*[1 +2,5+4,5]=315
x*7=315
x =315:7
x=45
x + x:5x7,5 + x : 2x9 = 315
x + x:37,5 + x :18 = 315
x + (37,5 + 18 ) = 315
x + 55,5 = 315
x = 315 - 55,5
x = 259,5
Giải
X + X : 5 x 7,5 + X : 2 x 9 = 315
X + 7,5 X / 5 + 9 X / 2 = 315
X + 1,5 X + 4,5 X = 315
7X = 315
X = 315 : 7
X = 45
Xx1+Xx1:5x7,5+Xx1:2x9=315
Xx1+Xx0,2x7,5+Xx0,5x9=315
Xx1+Xx1,5+Xx4,5=315
Xx(1+1,5+4,5)=315
Xx7=315
X=315:7
X=45
\(697:\frac{15x+364}{x}=17\)
\(\frac{15x+364}{x}=697:17=41\)
\(\frac{15x}{x}+\frac{364}{x}=41\)
\(15+\frac{364}{x}=41\)
\(\frac{364}{x}=41-15=26\)
\(x=364:26=14\)
\(92.4-27=\frac{x+350}{x}+315\)
\(\frac{x+350}{x}+315=341\)
\(\frac{x+350}{x}=341-315=26\)
\(\frac{x}{x}+\frac{350}{x}=26\)
\(1+\frac{350}{x}=26\)
\(\frac{350}{x}=26-1=25\)
\(x=350:25=14\)
\(x+x\div5\times\frac{15}{2}+x\div2\times9\)
\(x+\frac{x}{5}\times\frac{15}{2}+\frac{x}{2}\times9=315\)
\(\Leftrightarrow x+\frac{3x}{2}+\frac{9x}{2}=315\)
\(\Leftrightarrow7x=315\Rightarrow x=45\)