Answer:
$20
Step-by-step explanation:
12.6x-2.1x=210
10.5x=210
x=210/10.5
x=20
-4 = 5 + f....we want to isolate f, so subtract 5 from both sides
-4 - 5 = 5 - 5 + f
-9 = f <===
x is greater than or equal to 3
d
Answer:B