Solve the following systems of equations:
$0.5 x + 0.7 y = 0.74$
$0.3 x + 0.5 y = 0.5$

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Solution

Equation $(1) \times 30 : 15 x + 21 y = 22.2$

Equation $(2) \times 50 : 15 x + 25 y = 25$

Subtract two equations ;

$\Rightarrow 4 y = \frac{14}{5}$

$\Rightarrow y = \frac{7}{10}$

Substitute y in equation 1, we get ;

$\Rightarrow x = \frac{1}{2}$

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Similar questions

0.5 x + 0.7 y = 0.74

0.3 x + 0.5 y = 0.5

Solve the following systems of equations:

$0.5 x + 0.7 y = 0.74$

$0.3 x + 0.5 y = 0.5$

Solve for x and y:

$0.3 x + 0.5 y = 0.5, 0.5 x + 0.7 y = 0.74.$

0.5 x + 0.6 y = 2.3

0.2 x + 0.7 y = 2.3

Solve the following pair of linear equations by cross multiplication method

$0.3 x + 0.4 y = 2.5$ and $0.5 x - 0.3 y = 0.3$

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