A mathematical sentence stating that two expressions are equal

Can someone me my sister? she is in third grade. 50 points and brainlist! ones that are not answered. plz and thx!

Answer this question, only if you know the answer. 30 points and brainliest!

Mario has $14.35 left in his wallet. he spent $148.43 for tablecloths. then, he spent $92.05 for napkins. how much money did mario have in his wallet to start with?