Question

Gía trị của x thỏa mãn:      

\(\frac{37-x}{x+13}=\frac{3}{7}\)

Answer 1

\(\frac{37-x}{x+13}=\frac{3}{7}\)

=>7.(37-x)=3.(x+13)

<=>259-7x=3x+39

<=>3x+7x=259-39

<=>10x=220

<=>x=22

Answer 2

\(\frac{37-x}{x+13}=\frac{3}{7}\Leftrightarrow\left(37-x\right).7=\left(x+13\right).3\Leftrightarrow259-7x=3x+39\)(nhân chéo)

\(\Leftrightarrow3x+7x=259-39\Rightarrow10x=220\Rightarrow x=220:10\Rightarrow x=22\)

Vậy x=22

Answer 3

\(\frac{37-x}{x+13}=\frac{3}{7}\)

\(\Leftrightarrow\left(37-x\right).7=\left(x+13\right).3\)

\(\Leftrightarrow259.x-7=3.x-39\)

\(\Leftrightarrow3x+7x=259-39\)

\(\Leftrightarrow10.x=220\)

\(\Leftrightarrow x=220:10\)

\(\Leftrightarrow x=22\)

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Answer 4

X=22 nhé

Answer 5

\(\frac{37-x}{x+13}=\frac{3}{7}\)

\(\Rightarrow\left(37-x\right)\cdot7=\left(x+13\right)\cdot3\)

\(\Rightarrow259-7x=3x+39\)

\(\Rightarrow3x+7x=259-39\)

\(\Rightarrow10x=220\)

\(\Rightarrow x=220:10\)

\(\Rightarrow x=22\)

Vậy \(x=22\)

Answer 6

37 -x=3