You begin with $25 in savings and $50 in checking, each week you deposit $5 into savings and $10 into checking. after how many weeks is the amount in checking twice the amount in savings?

d is the correct answer

step-by-step explanation:

x= 8 because 3x = 3 * 8, and 3*8 = 24

explanation:

remove parenthesis:

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apply rule

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multiply fractions:

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divide:

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mordancy.

take the logarithm of both sides (the base of the log doesn't matter):

apply the exponent property - this says that :

distribute the log terms on both sides:

group like terms together:

divide through both sides by the coefficient on :

you can do some additional rewriting here using the properties of the logarithm to simplify things if you like: