Answer:
e= -2
Explanation:
To solve for e, we need to get e by itself. To do this, we need to move all the numbers to one side of the equation, and all the variables to the other
9e-7=7e-11
Add 7 to both sides
9e-7+7=7e-11+7
9e=7e-4
Subtract 7e from both sides
9e-7e=7e-7e-4
2e= -4
Now all the numbers are one sides, and the variables are on the other. e is still not completely by itself, it is still being multiplied by 2. To reverse this, divide both sides by 2
2e/2= -4/2
e= -2