280+(-2t)280+(−2·20)=280

Answer 1

Let's simplify the expression step by step.

1. Start with the equation:

   [

   280 + (-2t) = 280 + (-2 \cdot 20)

   ]

2. Calculate (-2 \cdot 20):

   [

   -2 \cdot 20 = -40

   ]

3. Substitute that back into the equation:

   [

   280 + (-2t) = 280 - 40

   ]

4. Simplify the right side:

   [

   280 - 40 = 240

   ]

Now, the equation looks like this:

[

280 - 2t = 240

]

5. To isolate (-2t), subtract 280 from both sides:

   [

   -2t = 240 - 280

   ]

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