Answer:
D. $175
Explanation:
Nick donated 2/5 of his money to charity, and it says he also spent $70 on charity.
Also, since we don't know the amount of money he has in his bank account, we write it as x. We have the equation:
(2/5)x = 70
The best way to isolate a variable with its coefficient is to multiply both sides with the reciprocal of said coefficient:
(5/2)(2/5)(x) = 70(5/2)
x = 175.
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