exam Maths Puzzle Numerical Ability

Solve the system of equation by graphing.
1.)
-7x + y = -8
-3x + y = -12

2.) 2x - 3y = 5
9y = 6x - 15

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exam Other Question

the greater of two numbers is 2 more than the lesser. the sum of 25 times the greater number and 50 times the lesser is 500. what are the number? graph f(x)= -x-2 do I first go like (0,-2) and (-2,0) then graph