X+17.92+15.33=72.31
-17.92
-15.33
x= 39.06
The amount you started with was $39.06.
Hope this helps ;}
Answer:
Step-by-step explanation:
Sarah is incorrect.
By plugging 10 in as 'x' to the equation, we get y=21+(2*10). 2 x 10 is 20, and 20 + 21 is <em>not</em> 42 - it's 41. So, Sarah is incorrect.
