Question

Compare the way the blood carries oxygen and carbon dioxide.

Answer 1

Answer

ˣ⁻⁴⁺²/ₓ₊₂ = ⁵/₇

The value of x = ?

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Here we can solve the problem by simple cross multiplication where the denominator of the fraction on the LHS gets multiplied by the numerator of the fraction at RHS and the numerator of the fraction in LHS gets multiplied by the denomination in RHS

$\sf:\implies \dfrac{x-4+2}{x+2} = \dfrac{5}{7}$

$\sf:\implies \dfrac{x-2}{x+2} = \dfrac{5}{7}$

$\small\qquad\quad\dag$ ❲ On Cross Multiplication ❳

$\sf:\implies 7(x-2) = 5(x+2)$

$\sf:\implies 7x-14 = 5x+10$

$\sf:\implies 7x-5x = 10+14$

$\sf:\implies 2x = 4$

$\sf:\implies x = \dfrac{24}{2}$

$\sf:\implies \underline{\boxed{\pink{\mathfrak{x = 12}}}}$

$\displaystyle\therefore\:\underline{\textsf{The value of x is\textbf{ 12}}}$