exam Maths Puzzle Numerical Ability

Please help with this one i keep getting stuck.
(4-4i)-(-3-2i)

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exam Other Question

Determine which two equations represent parallel lines.
y = -5x + 2
y = 5x + 2
y = 1/5 x + 2
y = -5x + 5 The sum of two numbers is 76. The second is 8 more than 3 times the first. What are the two numbers?