MathematicsIf (x+8)° and (2x+25)° are complementary, then x=

If $(x + 8) °$ and $(2 x + 25) °$ are complementary, then $x =$

A
$19 °$
B
$20^{o}$
C
$17^{o}$
D
$16^{o}$

Solution:

$\begin{array}{l} x + 8 ° + 2 x + 25 ° = 90 ° \\ 3 x + 33 ° = 90 ° \\ 3 x = 90 ° - 33 ° \\ 3 x = 57 \\ x = 19 ° \end{array}$

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