Answer:
-7
Step-by-step explanation:
90+30=120
180-120=60
x+67=60
x=-7
x = 173
70
Third one is correct
10 y=-1x-1 12 y=5/3x+5
-7+ y/3
you just add like terms
(Y-1)Y=9
Y²-y=9
Y²=9+y