Question

Solve : 149x – 330y = -511 ; - 300x + 149y = -32​

Answer 1

Answer:

149x-330y=-511.......(1)×300

= 44700x-99000y=153300...(3)

-300x+149y=-32......(2)×149

= -44700x+22201y=4768......(4)

add equation 3 and 4

(3)+(4)

-99000y+22201y=153300+4768

-76799y=158068

y=-2.058

substitute the value of y in the equation of 1

149x-330×(-2.058)=-511

149x+679.14=-511

149x=-1190.14

X=7.99

Answer 2

Answer:

149x-330y=-511.......(1)×300

= 44700x-99000y=153300...(3)

-300x+149y=-32......(2)x149

= - 44700x + 2201y = 4768 ..... (4)

add equation 3 and 4

(3) + (4)

-99000y+22201y=153300+4768

- 76799y = 158068

y = - 2.058

substitute the value of y in the equation of 1

149x - 330(- 2.058) = - 511

149x + 679.14 = - 511

149x = - 1190.14

X = 7.99