Question 1193422
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The sum of Clyde and Wendy's age is 64.
In four years Wendy will be three times as old as Clyde.
How old are they now?
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{{{system(w+c=64,w+4=3(c+4))}}}


{{{64-c+4=3c+12}}} {{{after}}}{{{substitution}}}

{{{68-c=3c+12}}}

{{{68-12=4c}}}

{{{56=4c}}}

{{{4c=7*4*2}}}

{{{highlight(c=14)}}}
{{{and}}}{{{then}}},....