Question

5 Solve for x and y:
0.4x -1.5y = 6.5,
0.3x +0.2y = 0.9.​

Answer 1

Answer:

0.2(0.4x-1.5y=6.5)

1.5(0.3x+0.2y=0.9)

0.8x-3y=13

4.5x+3y=13.5

5.3x=26.5

x=26.5/5.3

x=5

now put the value of x

0.4(5)-1.5y=6.5

2-1.5y=6.5

1.5y=2-6.5

1.5y=-4.5

y= -4.5/1.5

y= -3

Answer

x=5 and y= -3