Question

Find the solution by substitution meathod:
2x+ y =21
3x+ 5y = 49​

Answer 1

Answer:

x=8, y=5

Step-by-step explanation:

2x+y=21-->(1)

3x+5y=49-->(2)

y=21-2x

substituting the value of y in (2)

3x+5(21-2x)=49

3x+105-10x=49

-7x=-56

x=8

y=21-2*8

=21-16

y=5

Answer 2

Answer:

2x+y=21--------(1)

3x+5y=49------(2)

Now from equation 1

y=21-2x