exam Maths Puzzle Numerical Ability

Slove each system using the substitution method.

x+4y=0
-x+2y=6

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exam Other Question

1/6 + (5/6)2 (1/6) + (5/6)4 (1/6) +(5/6)6 (1/6) +�� Sorry about the other ?, that was an incomplete eqaution.

(4xy)(5x)