The required equation is [tex]0.50\ p+0.75\ e= 3.50\\[/tex]
Given, Alejandro bought $3.50 worth of pencils and erasers at the school store.
The cost of each pencil is $0. 50.
The cost of each eraser is $0. 75.
Since He denotes no. of pencil by p and no. of eraser by e, so the required equation will be,
[tex]0.50\ p+0.75\ e= 3.50\\[/tex].
Hence the required equation is [tex]0.50\ p+0.75\ e= 3.50\\[/tex]
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