see x+y=180 since straight line so 60+y=180 y=120 x=60 y=120
3.
2 angles are 35 and congruent
35+35+3x+20=180 90+3x=180 minus 90 3x=90 divide 3 x=30
4.
ok so 180=50+?+? minus 50 130=2? divide 2 65=? now we have that is a straight line so 180=65+? 115=? now 115+?+?=180 2?=65 divide both sides by 2 ?=32.5
