Hi,

1 and 2 are "supplementary". If m 1 = 60° and m 2 = (2x + 20)

What is the value of x?

60° + (2x+20) = 180°

      2x = 100

       x = 50° 

Answer by Earlsdon(6294)   (Show Source): You can put this solution on YOUR website!
 You are being asked to solve for x using the given information:

Angles 1 and 2 are supplementary which means that their sum is 180 degrees.

So if you add angle 1 (60 deg.) and angle 2 (2x+20)deg. and set the  sum equal to 180 degrees, you'll have an equation that will allow you to solve for x.

 Simplify.

 Subtract 80 from both sides.

 Divide both sides by 2.

 

Answer by Tatiana_Stebko(1539)   (Show Source): You can put this solution on YOUR website!
 if angles 1 and 2 are supplementary then their sum is 180°.

So









 

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