Question

Solve the simultaneous equations 2x+2y=6 2x+y=5

Answer 1

Subtracting the equations

y=1

Thus x=2

Answer 2

Answer:D

2x+2y=6 = x+y =3 ......1

2x+y= 5......2

Therefore by elimination method.

x+y=3

2x+y=5

(-) (-) (-)

=- x=-2

x=2

1 implies x+y=3

2+y=3

y=1

Therefore x=2,y=1

Simplification:-

1st equation - x+y=3 = 2+1=3 = 3=3.

2nd equation - 2x+y=5

2(2)+1=5

4+1=5

5=5.

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