exam Maths Puzzle Numerical Ability

What are the two answers in both the substitution method and linear combinations?

1] 2x-7y=10
5x-6y=2

2] x+y=3x-1
x-y=1-x

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exam Other Question

Find the equation of the line, write your answer in slope intercept.

The line goes (1,4) and is parellel to x-2y=6

I have come up with the slope, I believe it is (1/2, -3)Is this correct?
Solve the problem. Joe has a collection of nickels and dimes that is worth $6.00. If the number of dimes were doubled and the number of nickels were increased by 6, the value of th