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Maths Puzzle
Numerical Ability
solve for all unknown variables:
RmTm=RrTr ... these are what they give you... Rm=8, Rr=2, Tr=5-Tm
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book Other Question
How do figure this problem out? 3(3x+1)-(x-1)=6(x+10)
and this problem 0=5(7-x)+12x
Jan invested $1200 at a certain simple interest rate and $2200 at a rate 3% higher. Her annual earnings were $253. Find the two interest rates if she earned $121 more on the larger