Question

0.2x + 0.1y = 25
2(x - 2) - 1.6y = 116​

Answer 1

Answer:

x = 100, y = 50

Step-by-step explanation:

0.2x + 0.1y = 25 (i)

2(x - 2) - 1.6y = 116

=2x - 4 - 1.6y = 116

=2x - 1.6y = 120 (ii)

multiply (i) by 10 (elimination method)

10(0.2x + 0.1y = 25)

2x + y = 250

2x - 1.6y = 120

- + -

= 2.6y = 130

y = 50

substituting value of y in (i)

= 0.2x + 0.1(50) = 25

= 0.2x + 5 = 25

= 0.2x = 20

x = 100