Question

solve the following simultaneous equations graphically
(3) x + y = 0 ; 2x - y =9
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Answer 1

Answer:

x = 3

y = -3

Hope this helps you :)

Answer 2

Answer:

x=95 and y=−275

Step-by-step explanation:

Let's solve your system by substitution.

3x+y=0;2x−y=9

Step: Solve3x+y=0for y:

3x+y=0

3x+y+−3x=0+−3x(Add -3x to both sides)

y=−3x

Step: Substitute−3xforyin2x−y=9:

2x−y=9

2x−−3x=9

5x=9(Simplify both sides of the equation)

5x5=95(Divide both sides by 5)

x=95

Step: Substitute95forxiny=−3x:

y=−3x

y=−3(95)

y=−275(Simplify both sides of the equation)