you begin with $25 in a savings account and $50 in the checking account. Each week you deposit $5 into savings and $10 into chec
king. After how many weeks is the amount in checking twice the amount in savings? write and solve an equation.
1 answer:
Let
represent the amount is saving account after n weeks, and
let
represent the amount is checking account after n weeks.
so:
and
thus to find
<span>
"the amount in checking twice the amount in savings"
</span>we solve the equation:
50+10x=2(25+5x),
50+10x=50+10x
this is true for any x (any number of weeks)
Answer: the amount i<span>n checking is twice the amount in savings ALWAYS</span>
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