exam Maths Puzzle Numerical Ability

Solve each of the following systems by substitution
8x - 4y =16
y = 2x - 4

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exam Other Question

i NEED HELP IN THESE PROBLEMS DEALING WITH MONEY CAN SOMEONE HELP ME PLEASE.

Problem #1

I have to find the simple interest. Assuming a 360-day year. Round result.

$17,00 please help me solve this problem 5x2-19x=4 thank you