Answer:
a) -10
b) 7
Step-by-step explanation:
a)
b)
x>-1
Subtract 0.7 from both sides
You have miscopied the second equation as it contains a third variable B when there isn't a B in the answers.
Please correct it for assistance
50
420 x .1 = 42
420 + 42 = 462
400 x .2 = 80
400 + 80 = 480
The first one is cheaper
