Question

Solve,using the method of substitution:1.5x+0.1y=6.2;3x-0.4y=11.2

THE FIRST ANSWER AND THE BEST ANNSWER WILL BEARLED AS BRAINLIEST......!!!!!,,,,,?????

Answer 1

Answer:

15 /10 x +1/10 y =62 /10

firstly,    15x +y / 10 =62/10

150 x+ 10 y=620

divide by 10 , 15x +y=62

therefore,  y =62 - 15 x        ........... 1

3x - 4 /10 y =112 /10

30x - 4y / 10 =112/ 10

300x - 40y= 1120

divide by 10, 30 x - 4 y= 112

30 x - 4(62 - 15x) = 112

30 x - 248-60 x = 112

- 30 x= 360

x = - 12

similarly, y = 242