exam Maths Puzzle Numerical Ability

could you please solve this equation using the substitution method and indicate if it is independent, inconsistent or dependent.
Thank you.

x = 1/8y - 1
y = 1/4x + 39

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exam Other Question

For the equation , perform the following:
a) Solve for all values of x that satisfies the equation.
Answer:

Show work in this space




b) Graph the functions and
Which ordered pair is a solution of : 5x-2y = 12