Respuesta :

wegnerkolmp2741o

Answer:

x=9

Step-by-step explanation:

Angle CHD and angle DHE are complementary angles, which means they add to 90.

2x+9 + 7x = 90

Combine like terms.

9x+9 = 90

Subtract 9 from each side.

9x+9-9 = 90-9

9x = 81

Divide each side by 9.

9x/9 = 81/9

x=9

tamiyoamiyo

Answer:

You can see that the graph is cut into 4. So one box is 90 degrees. You can also see that both 2x+9 and 7x added together will equal 90. You can then set up your equation :

(7x)+(2x+9)=90

And then from there you can solve it as any other algebraic expression.

9x + 9 = 90

      -9     -9

9x = 81

/9    /9

x=9

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