Step-by-step explanation:
4.
22+4x= 90
4x=90-22
4x=68
x°=17°
7.
(x-5)°+29°=180°
x-5+29=180
x= 180-24
x=156°
10.
(x+3)°+49°=90°
x= 90-52°
x=38°
