Question

43x+67y=-24;67x+43y=24 by substitutuon method

Answer 1

Answer: x=12/55, y=12/55

Step-by-step explanation:

43x+67y = 24

multiply 43 on both sides

43*(43x+67y) = 24*43

1849x +2881y = 1032....equation 1

67x+43y = 24

multiply 67 on both sides

67*(67x+43y) = 24*67

4489x+2881y = 1608....equation 2

equation 2 - equation 1

(4489x+2881y)-(1849x +2881y) = 1608-1032

4489x+2881y-1849x -2881y = 576

2640x= 576

 x=12/55

substitute in  67x+43y = 24

67(12/55) + 43y =24

804+2365y= 1320

2365y=516

y= 516/2365

y=12/55