Question 1099711
Convert the sentences to algebraic equations and then solve them.
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{{{M=S+5}}}
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Twenty years ago,
{{{S-20=(1/2)(M-20)}}}
{{{2S-40=M-20}}}
{{{M-2S=-20}}}
Substitute from above,
{{{(S+5)-2S=-20}}}
{{{-S+5=-20}}}
{{{-S=-25}}}
{{{S=25}}}
Now use either equation to solve for M.