Question

Equations with variables on both sides
9e−7=7e−11

Answer 1

9e - 7e = 7 - 11

2e = -4

e = -4/2

e= -2 
hope this helps

Answer 2

9e-7=7e-11

7e-7=7e-11

2e-7=11

2e-7=7

2e=4
2 = 4
 answer is 2