Complementary angles have sum 90°
[tex]\\ \rm\Rrightarrow 5x+7x-6=90[/tex]
[tex]\\ \rm\Rrightarrow 12x-6=90[/tex]
[tex]\\ \rm\Rrightarrow 12x=96[/tex]
[tex]\\ \rm\Rrightarrow x=8[/tex]
Answer:
x = 8
Step-by-step explanation:
Complementary angles are two angles with measures that sum to 90°
Given:
⇒ m∠C + m∠D = 90°
⇒ 5x + 7x - 6 = 90
⇒ 12x - 6 = 90
⇒ 12x = 96
⇒ x = 8
