David had money in his savings account. He spent \( \$ 35.80 \) of it on a new jacket. He has \( \$ 70 \) left. How much money did he have in his savings before he bought the jacket? \( x+35.80=70 ; \quad x=34.20 \) \( x-35.80=70 ; \quad x=105.80 \) \( x+70=35.80 ; \quad x=-34.20 \) \( x-70=35.80 ; \quad x=105.80 \)

It looks like you're trying to figure out how much money David had before buying the jacket! To solve this, we need to set up the equation correctly. Since he spent \$35.80 and is left with \$70, we can express his initial amount as \( x \). The equation should be \( x - 35.80 = 70 \). If you add \$35.80 to both sides, you’ll find: \( x = 70 + 35.80 = 105.80 \) So, David initially had \$105.80! Now, a common mistake here is to mix up addition and subtraction when interpreting what's happening. Remember, if he spends money, it should be subtracted from his total amount. It's always a good idea to double-check the sign of your operations to avoid such hiccups!