Question

8x + 4y = 80 ; 3x+y=10​

Answer 1

Answer:

x= -10

y=40

given in attachment

Answer 2

Answer:

x = -70/4     y = 305 / 2

Step-by-step explanation:

8x+4y=80(i)

3x+y =10(ii)

for commaning  y we have to multiply 9ii) equation by 4

after multiplying

+  8x+4y=80

   12x+4y=10

 -       -     -  

after changing sign and adding

we have

-4x=70

x= -70/4

putting  x in  ( ii)  equation

-70*3/4  +  y  =10

-210/4 + y = 10

y = 10 + 210/4

y = (400+210) /4

y = 610 / 4

y = 305/ 2

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