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xB=\frac{\sqrt{10}}{\sqrt{7}}
Rewrite the square root of the division \sqrt{\frac{10}{7}} as the division of square roots \frac{\sqrt{10}}{\sqrt{7}}.
xB=\frac{\sqrt{10}\sqrt{7}}{\left(\sqrt{7}\right)^{2}}
Rationalize the denominator of \frac{\sqrt{10}}{\sqrt{7}} by multiplying numerator and denominator by \sqrt{7}.
xB=\frac{\sqrt{10}\sqrt{7}}{7}
The square of \sqrt{7} is 7.
xB=\frac{\sqrt{70}}{7}
To multiply \sqrt{10} and \sqrt{7}, multiply the numbers under the square root.
7xB=\sqrt{70}
Multiply both sides of the equation by 7.
\frac{7xB}{7x}=\frac{\sqrt{70}}{7x}
Divide both sides by 7x.
B=\frac{\sqrt{70}}{7x}
Dividing by 7x undoes the multiplication by 7x.
xB=\frac{\sqrt{10}}{\sqrt{7}}
Rewrite the square root of the division \sqrt{\frac{10}{7}} as the division of square roots \frac{\sqrt{10}}{\sqrt{7}}.
xB=\frac{\sqrt{10}\sqrt{7}}{\left(\sqrt{7}\right)^{2}}
Rationalize the denominator of \frac{\sqrt{10}}{\sqrt{7}} by multiplying numerator and denominator by \sqrt{7}.
xB=\frac{\sqrt{10}\sqrt{7}}{7}
The square of \sqrt{7} is 7.
xB=\frac{\sqrt{70}}{7}
To multiply \sqrt{10} and \sqrt{7}, multiply the numbers under the square root.
7xB=\sqrt{70}
Multiply both sides of the equation by 7.
7Bx=\sqrt{70}
The equation is in standard form.
\frac{7Bx}{7B}=\frac{\sqrt{70}}{7B}
Divide both sides by 7B.
x=\frac{\sqrt{70}}{7B}
Dividing by 7B undoes the multiplication by 7B.