exam Maths Puzzle Numerical Ability

Solve. -3(10x - 3) + 10(3x - 3) = x - 7

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exam Other Question

Graph y = 3x.

I am not understanding how to solve this type of problem and then graph it. Can you help break it down for me. I have to do a number of similar type problems. Thanks! Please help me with this problem!
If:
z=4(cos50 degrees + i sin50 degrees) and w=2(cos340 degrees + i sin340 degrees), find z/w in polar form.

Thank you, natalie