What number added to -70 has a sum of zero ?

Answer 1

To find the number that, when added to -70, gives a sum of zero, you can set up the equation:

\[ x + (-70) = 0 \]

To isolate \(x\), you can add 70 to both sides of the equation:

\[ x = 70 \]

So, the number that added to -70 gives a sum of zero is 70.