book Maths Puzzle Numerical Ability

y=-x+2

x -2 -2 0 1 2
y

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book Other Question

~K v ~ M / ~J v ~M

How do I tell if this is valid or invalid?? The sum of the measures of the angles in any triangle is 180 degrees. In triangle ABC, angle A is five more than twice the measure of angle B. Angle C is five less than three times the measure of angle B.

I tried: 2b+5=A 3B{c-5}

No luck