Question

0.2x+0.3y=1.3
0.4x+0.5y=2.3
solve by substitution method

Answer 1

Answer:

x=2;y=3

Step-by-step explanation:

0.2x+0.3y=1.3

(0.2x+0.3y)×10=1.3×10

2x+3y=13 ---[1]

0.4x+0.5y=2.3

(0.4x+0.5y)5=2.3×5

2x+2.5y=11.5 ---[2]

Eq. [1]-[2]

2x+3y-2x-2.5y=13-11.5

0.5y=1.5

5y=15

y=3

x=(13-3y)/2=(13-3×3)/2=2

i hope it helps.