# Substitution

solve equations by substitution:

x+y= 11
y=5x-25

Correct result:

x =  6
y =  5

#### Solution:

x+y= 11
y=5x-25

x+y= 11
y=5•x-25

x+y = 11
5x-y = 25

x = 6
y = 5

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