Question

Ahmed recorded the temperature outside his window one morning. On the second day, the temperature went up 7 degrees. On the third day, the temperature went down 10 degrees. On the fourth day, the temperature went down 6 degrees, and it was 1°F.What was the temperature on the first day?

Answer 1

Answer:

$-2^{\circ}\text{F}$

Step-by-step explanation:

Let $x$ be the temperature on the first day

Second day temperature

$x+7$

Third day temperature

$x+7-10$

Fourth day temperature was $1^{\circ}\text{F}$

$x+7-10+6=1\\\Rightarrow x+3=1\\\Rightarrow x=1-3\\\Rightarrow x=-2^{\circ}\text{F}$

On the first day the temperature was $-2^{\circ}\text{F}$