Question

0.2x + 0.3y = 1.3
0.4x + 0.5y = 2.3​

Answer 1

Answer:

x = 2 and y = 3

Step-by-step explanation:

We have

 0.2x + 0.3y = 1.3 ----- × 2

 0.4x + 0.5y = 2.3----- × 1

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  0.4x + 0.6y = 2.6

  0.4x + 0.5y = 2.3

(-)        (-)           (-)

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   0.0x + 0.1y = 0.3

    y = $\frac{0.3}{0.1}$

    y = 3

Putting y = 3 in 0.2x + 0.3y = 1.3, we get

$0.2x + 0.3(\,3)\, = 1.3\\\\ 0.2x + 0.9 = 1.3\\\\ 0.2x = 1.3 - 0.9\\\\ 0.2x = 0.4\\\\ x = 2$

Thus, we have x = 2 and y = 3

Answer 2

Answer:

We have

0.2x + 0.3y = 1.3 ----- × 2

0.4x + 0.5y = 2.3----- × 1

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

 0.4x + 0.6y = 2.6

 0.4x + 0.5y = 2.3

(-)        (-)           (-)

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

  0.0x + 0.1y = 0.3

   y =  

   y = 3

Putting y = 3 in 0.2x + 0.3y = 1.3, we get

Thus, we have x = 2 and y = 3

Step-by-step explanation: