exam Maths Puzzle Numerical Ability

Solve the system of equations using the addition (elimination) method. If the answer is a unique solution, present it as an ordered pair:(x,y). If not, specify whether the answer

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exam Other Question

y-5x-3
4x+5y=-11
Find the following if f(x) = 4x -3 f(-1)

-1 = 4(-1) - 3
-1 = -4 -3
-1 = -1

Double checking to see if I did these right