exam Maths Puzzle Numerical Ability

I would love to have some help with solving this system of equations using the substitution method. Thanks!



x + y = 2
x = 4y + 5

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exam Other Question
(2,3);(-2,3);(-2,-3);(2,-3).If you join these points ,What will the shape be?My answer is square. Factor completely: 9x^2 + 12xy + 4x^2 -25

My solution to this problem was (3x+2y)-25

I am not too confident that this is correct. If this is not correct could you assist me with this problem please. Thanks.