To find the number that 70 is divided by to equal -7, you can set up the equation:
\[ 70 \div x = -7 \]
To find \(x\), multiply both sides by \(x\) and then by -1:
\[ 70 = -7x \]
Now, divide both sides by -7:
\[ x = \frac{70}{-7} \]
Calculating that gives:
\[ x = -10 \]
So, 70 divided by -10 equals -7. The answer is -10.