Question

0.2x + 0.1y = 25
2(x - 2) - 1.6y = 116​

Answer 1

Answer:

$x = \frac{325}{3} and \: y = \frac{100}{3}$

Step-by-step explanation:

0.2x + 0.1y = 25

Multiplying both the sides by 10

=> 2x + y = 250 ............(1)

And 2( x - 2 ) - 1.6y = 116

=> 2x - 4 - 1.6y = 116

=> 2x - 1.6y = 120

Multiplying both the sides by 10

=> 20x - 16y = 1200

=> 5x - 4y = 300 ...............(2)

Multiplying equation (1) by 4 and adding equation (2) in it., we have,

8x + 4y = 1000

5x - 4y = 300

---------------------

12x = 1300

x = 1300/12

$= > x = \frac{325}{3}$

substituting x in equation (1)

$= > 2 \times \frac{325}{3} + y = 250 \\ = > \: y = 250 - \frac{650}{3} \: \: \: \: \: \: \: \: \:$

$= > y = \frac{750 - 650}{3}$

$= > y = \frac{100}{3}$

Answer 2

Answer:

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Step-by-step explanation: