exam Maths Puzzle Numerical Ability

2x - 4y = 8
2x - y = 1y

i have to eliminate, substitute and graph
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exam Other Question

The price per person to rent a limousine for a prom varies inversely as the number of passengers. If 5 people rent the limousine, the cost is $70 each. How many people are renting the limousine when the cost per couple is $18.50? identify inconsistent systems and systems with dependent equations, using set notation to express solution sets.

4(x-y)=-12
4(x+y)=-20