exam Maths Puzzle Numerical Ability

wihtout graphing, decide whether the points would lie on the graph of the equation.

2x+4y=20

a. (6,2)
b. (2,4)
c. (10,4)

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ACME Skateboards Inc., has paid consultants to look over last year's sales and provide them with supply and demand equations that fit their sales da Find the equation of the line which is parallel and perpendicular to 3x - 2y = 6 and passes through the point (1,2).