Use the numbers 2, 11, 13, and 15 to write an equation.Replace one of the numbers in your equation in Exercise 8 with thevariable y. Determine whether 2, 11, 13, or 15 is a solution of yourequation.

Given:
[tex]2\cdot11+13-15=20[/tex]say we replace 13 with y, then the resulting equation is:
[tex]2\cdot11+y-15=20[/tex]
solving,
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