exam Maths Puzzle Numerical Ability

I have two questions Solve Algebraically

#5 N= -2M t 9
N= 3M -11

#6 y = 1.5x -8
y = -2.5x t 2.5

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Tutors I have the following study problem..thank you
Use long division to find the quotient Q(x) and the remainder R(x) when P(x) is divided by d(xp(x)=x^4+2x^3-2x+4 d(x)=x-2
Find the graph of this piecewise function.
Y=f(x-1)-2