Answer:
∠ x = 20°
Step-by-step explanation:
Complementary angle sum to 90° , so
2x + x + 30 = 90°
3x + 30 = 90° ( subtract 30 from both sides )
3x = 60° ( divide both sides by 3 )
x = 20°
X = 70
[tex]x + 30 + 2x = 90 \\ 3x - 30= 90 \\ x - \frac{30}{3} = \frac{90}{3} \\ x - 10 = 30 \\ Add 10 to \: both \: sides: \\ x-10+10=30+10 \\ Simplify \: the \: arithmetic: \\ x=30+10 \\ Simplify \: the \: arithmetic: \\ x=40[/tex]
