Question

Find X and Y, if :
300x + 200y = 11/2, and
200x + 240y = 28/5.​

Answer 1

Answer:

x = 0.0063, y = 0.018

Step-by-step explanation:

(300 x + 200 y = 11/2) × 200   -----------(i)

(200 x + 240 y = 28/5) × 300

60000 x + 40000 y = 1100     -----------(ii)

60000 x + 72000 y = 1680     ----------(iii)

Subtracting (ii) from (iii),

60000 x + 72000 y = 1680

60000 x + 40000 y = 1100

-               -                    -

32000 y = 580

∴ y = 0.018

Putting value f y in (i),

300 x + 200(0.018) = 11/2

300 x + 3.6 = 11/2

300 x = 3.8/2

x = 1.9/300

∴ x = 0.0063.