Question 214067
This is a problem of 2 equations with two unknowns. 
Let x be one number
Let y be the other number
From the information given, you can write:
Equation #1: {{{x=5y-4}}}
and:
Equation #2: {{{x+y=26}}}
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Substitute the expression for x from Equation #1 into Equation #2:
{{{5y-4+y=26}}}
Solve for y:
{{{6y-4=26}}}
{{{6y=30}}}
{{{highlight(y=5)}}}
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Substitute this value for y into Equation #2:
{{{x+5=26}}}
Solve for x:
{{{highlight(x=21)}}}
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Check these answers by substituting the values we got for x and y back into each equation and be sure the equation holds true.
{{{5(5)-4+5=26}}}
{{{25+1=26}}}
{{{26=26}}}  <--- True!
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{{{5+21=26}}}
{{{26=26}}}  <--- True Again!
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Good Luck,
tutor_paul@yahoo.com