exam Maths Puzzle Numerical Ability

Solve by addition method. Indicate whether independent, inconsistent or dependent.

-3x + y =3
2x - 3y = 5

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exam Other Question

In triangle CDE, CD=3y, DE=30, and CE=45. Determine the range possible values for y

I think the answer is 5 < y < 25

is this correct? Directions : angle a and b are complementary find measure of
measure of angle a = 3x - 7 and the measure of angle b is 11x - 1