Answer:
$448
Step-by-step explanation:
-2x=30-120
-2x = -90
=x = -90/-2
=x = +45
d/7 = c
-5c+d=2c
Add 5c to each side
-5c+5c+d=2c+5c
d = 7c
Divide each side by 7
d/7 = 7c/7
answer simple
i thinks its b