Respuesta :

Supplementary angles add up to 180, so
6x+60+90 = 180 and solve for x
6x= 30
x=5
Exiting or five because in gem Dos you have to do parentheses first from left to right size 6X +60 is already simplified times 90 now you move your parentheses so you would multiply 16 times 9016×90 whatever that is you would add that to six facts which is not