Question

2. Solve the following questions by cross-multiplication method
0.2x + 0.3y = 1.3
0.4x + 0.5y = 2.3

Answer 1

Answer:

take out 1/10 from both eqn.

I. e. 1/10(2x+3y) =1.3

1/10(4x+5y) =2.3

now, 2x+3y=13-----1

4x+5y=23----2

multiply eqn. 1 by 4 and eqn. 2 by 2..

and then subtract eqn. 2 from eqn. 2

we get you=3 and x=2.