measures of a triangle. m<a=(x+30)

m<b=x
M<c=(x+60)

so then would i set up the problem as
x+30+x+x+60=180
and then would i combine like terms so i get
30+x+60=180
and then
30-60=30
so then 180/30=6
so x=6

When I combine terms I get

3x+90=180
subtract 90 from each side, then divide by three to get x.
Then the angles are x, x+30, and x+60