Question 1095770
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{{{M = 2J}}}  Mary’s hourly wage is twice that of John’s<br>
{{{D+J = 60}}}  John’s and Dennis’ hourly wages together total $60<br>
{{{J = 3D}}}  Dennis earns 1/3 of John’s rate (i.e., John earns 3 times as much as Dennis)<br>
Solving should be relatively easy.<br>
Use the third equation to substitute in the second equation to solve for D; then use the third equation to solve for J; then use the first equation to solve for M.