exam Maths Puzzle Numerical Ability

HOW DO YOU SLOPE

Slope: -2; y-intercept: (0, 4)

Slope: 5; y-intercept: (0, -2)

Slope: -3/4 ; y-intercept: (0, 8

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exam Other Question

Tutor could you please help me with the following problem: x+4y=16

If both x and y are positive integers in this equation, how many different values can x have? (1,2, 3 or 4) I chose 3..am I correct?

Thank you for your help! ((x-a)/(b+c))+((x-b)/(c+a))+((x-c)/(a+b))=3