Question

Addison earn $25 mowing her neighbor's lawn then she loaned her friend $18 and got 50 from her grandmother for her birthday she now has $86 how much money did Addison have to begin with

Answer 1

She had $29. You just do the equation backwards. 86-57=29. 
To check if your answer is correct;
29+25=54
54-18=36
36+50=86

Answer 2

Solution: The total money did addison have to begin with is $29.

Explanation:

Let the addison begin with money $x.

It is given that the addison earn $25 from his neighbor and $50 from her grandmother. So total money addison has $\ x+\ 25+\ 50=\ x+\ 75$

She loaned her friend %18.

Now she has $\ x+\ 75-\ 18=\ x+\ 57$

It is given that she had $86.

$\ x+\ 57=\ 86\\\ x=\ 86-\ 57\\\ x=\ 29$

Therefore, the total money did addison have to begin with is $29.