Question

solve simultaneous equations
2x + y = -2 and 3x - y = 7​

Answer 1

Answer:  2x + y = -2 and 3x - y = 7​

Step-by-step explanation:

Answer 2

Answer:

2x+y = -2

2x = -2-y

x = (-2-y)/2...(1)

putting the value of x in the other equation we get,

3x-y = 7

3(-2-y/2)-y = 7 (from eq 1)

-6-3y/2-y = 7

-6-3y-2y = 7×2

-6-5y = 14

-5y = 14+6

y = 20/-5

y = -4

putting the value of y in eq 1 we get,

x = -2-y/2

x = -2-(-4)/2 (y = -4)

x = -2+4/2

x = 2/2 = 1

therefore, x = 1

and y = -4

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