Respuesta :

42.5 I think

3x+10+x=180
4x=170
170/4=x
X=42.5

Answer:

x= 20

Step-by-step explanation:

Information needed:

Complementary angles add up to 90°

Angle ABC= x°

Angle DBC= (3x+10)°

Equation:

x+(3x+10)= 90

Solve:

x+(3x+10)= 90

x+3x+10= 90

4x+10= 90

    -10  -10

4x= 80

/4    /4

x= 20

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