book Maths Puzzle Numerical Ability

Two angels are complementary. If the measure of one angle is x degrees, represent the measure of the other angle as an expression in x.

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book Other Question
2x-3y+5z=-5, 2y-3z=4, and 4z=-8 please help me. graph the function
f(x)=
-4
------
x

for values of x where -8&#8804; x < 0 and 0< x &#8804;8