exam Maths Puzzle Numerical Ability

Find the discriminant and determine the number and the type of solutions.

4x ^2 = 4x = 2+0

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exam Other Question

Hi!!!!!!

I have been having trouble with graphing, I sorta stubbled across this site. I am sure you all can help me. So basically it says to "Solve by graphing":
3x+y=5 -2x+3y=4
Please and Thank You=) what does the comma mean between the two fractions? and how would i solve it?

64. 4/x-y , 5x/2y-2x