Answers

2016-04-26T11:54:56+05:30
0.4x + 0.3y = 1.7 and 0.7x -0.2y=0.8
Multiply both equations by 10
We get
4x + 3y = 17 and 7x - 2y = 8

From the second equation

x = (8+2y)/7
Substitute the value of x into eqution 1
4[
(8+2y)/7] + 3y = 17

32 + 8y + 84y = 68

92y = 36

y = 36/92 = 9/23

Substitute the value of y into the value of x = 
(8+2y)/7

we get x = 202/161
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