Answer:
Step-by-step explanation:
Given are two simultaneous equation in two variables x and y as
\(x+y =9\\0.5x+0.2y = 4.05\)
To solve this let us multiply second equation by 5
\(x+y =9\\2.5x+y = 20.25\\----------------------\\-1.5x =-11.25\\x = 7.5\)
Substitute x value in I equation to get
\(7.5+y =9\\y =1.5\)
So solution set is
\(x=7.5\\y=1.5\)
