book Maths Puzzle Numerical Ability

Having trouble This Problem in my Algabra class.
The problem is
Which of the ordered pairs
(-1, 2), (7, 0), (3, -1), (-17, 6)
are solutions for the equation x + 4y = 7?


Thnks you

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book Other Question

The high of an equilateral triangle is 18 meters. What is its area? could you show me what a 8cm mass or circle would be equilivant to?