Question

0.7x-0.2y=0.8
0.4x+0.3y=1.7

Answer 1

What To Do In This... I Mean What's The Full Question...

Comment And i'll Answer.

Answer 2

0.7x-0.2y=0.8 --1
0.4x+0.3y=1.7 --2
multiply 1 equation by 3 & multiple 2 equation by 2
2.1x-0.6y=2.4
0.8x+0.6y=3.4
now cancel - 0.6y & + 0.6y and add the both equation
2.9x=5.8
x=5.8/2.9
x=2
put x=2 in 1 equation
0.7x - 0.2y=0.8
(0.7*2) - 0.2y=0.8
1.4-0.2y=0.8
-0.2y=0.8-1.4
-0.2y= -0.6
0.2y= 0.6
y=0.6/0.2
y =3
x=2


x=1.65