exam Maths Puzzle Numerical Ability

Can you plese help me with the following?

I need to solve and graph the following equation and interpet the result:

2x-3y=6 and 2x+y=-10.

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exam Other Question

please help me in this problem
let f(X)=x/15,x=1,2,3,4,5 zero elsewhere be the pdf of a random variable , find the distribution function f(x) of x and sketch its graph along with that of f(x) Are the following lines parallel, perpendicular, or neither?
L1 with equation x - 5y = 10
L2 with equation 5x + y = 5