Question

solve the equation by the method of cross multiplication 0.8=16d step by step​

Answer 1

Answer:

0.5x+0.8y = 0.44 ----- (1)

0.8x+0.6y = 0.5 ----- (2)

To make the decimal numbers into integers, we have to multiply the first equation by 100 and the second equation by 10.

50x+80y-44 = 0 ----- (1)

8x+6y-5 = 0 ----- (2)

x/(-400-(-264)) = y/(-352 -(-250)) = 1/(300-640)

x/(-400+264) = y/(-352+250)) = 1/(-340)

x/(-136) = y/(-102) = 1/(-340)

x/(-136) = 1/(-340)

x = (-136)/(-340)

x = 0.4

y/(-102) = 1/(-340)

y = (-102)/(-340)

y = 0.3

So, the solution is (0.4, 0.3).