Question

x+y=3,2x+y=-2 by using the method of cross multiplication ​

Answer 1

Answer:

x+y=3 , 2x +y=-2.

Step-by-step explanation:

first equation is x+y=3

second equation is 2x+y=-2.

x+y=3. ( first equation )×2

2x+y=-2. (second equation)

2x+2y=6. ( after multiplying by 2 )

2x+y=-2

- - +. ( the sign gets changed )

_________

y=4 (x will get canceled and + (-) will become - )

so, y=4

put in second equation .

2x+4=-2

2x=-2-4

2x=-2

x=-2÷2

x=-1

so the answers are ....

x=-1

y=4

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