book Maths Puzzle Numerical Ability

16-3y=5

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book Other Question

Solve the following system of linear inequalities graphically - including a list of the coordinates for your points
3x - y < 6
x > 1
y < 3

If you are unable to Help me solve for X using the following question;

-5x-1 = 6(x+9)
I got -5 -1 = 6x + 54 and I get lost from here...