Thread: Pls help me find X and angle

Please help with this math problem:

Angle 2 equals 10x +15 and is supplementary to angle 3 which equals 7x +42. Find x and each angle.
Thanks.

If angle 2 and 3 are supplementary, then they add up to 180 degrees, therefore:



Now we plug each equation in:





All you do now is solve for x, plug x into the two original equations and find each individual angle.

And you're done.

I hope this helps.

Thanks so much. That's perfect.