Question

solve for x and y: 149x-330y=-511 , -330x+149y=-32

Answer 1

149x-330y= -511  ------ (i)
-330x+149y= -32 ------- (ii)

From (i)
149x= -511 + 330y
x = (-511 + 330y)/149 ----- (iii)


Substitute (iii) into (ii)

-330(-511 + 330y)/149 +149y= -32 ------- (iv)

Multiply through by 149
-330(-511 + 330y) + 22201y = -1568


Expand the bracket
168630 – 108900y + 22201y = -1568
– 108900y + 22201y = -1568 – 168630


-86699y =  -170198
y = 1.963

x = (-511 + 330y)/149


 x = (-511 + 330 x 1.963)/149
   = 0.918

x = 0.918, y = 1.963

Answer 2

Answer:

Step-by-step explanation:

149x-330y= -511 ------ (i)

-330x+149y= -32 ------- (ii)

From (i)

149x= -511 + 330y

x = (-511 + 330y)/149 ----- (iii)

Substitute (iii) into (ii)

-330(-511 + 330y)/149 +149y= -32 ------- (iv)

Multiply through by 149

-330(-511 + 330y) + 22201y = -1568

Expand the bracket

168630 – 108900y + 22201y = -1568

– 108900y + 22201y = -1568 – 168630

-86699y = -170198

y = 1.963

x = (-511 + 330y)/149

x = (-511 + 330 x 1.963)/149

= 0.918

x = 0.918, y = 1.963