Answer:
x = -1255
Step-by-step explanation:
336+x/5=85
Subtract 336 from each side
336-336 +x/5=85-336
x/5 =-251
Multiply each side by 5
x/5 * 5 = -251 *5
x = -1255
The temperature went down by 12 degrees. (Or you could say it changed by -12 degrees)
By looking at this it doesnt look like she had any mistakes