Divide sales tax amount over the item's cost
23.1 / 330 = 0.07
Therefore the sales tax is 7%
4- 7x = 23- 5
4 - 7x = 18
-4 = -4
-7x = 14
/-7 = /-7
X = -2
3x = -6
Beats me man not enough information
ANSWER:
The right option is d)
As 5*1=5
5*3=15
5*4=20
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