Answer:
-12e-x + 8 = 7
-12e-x = 7-8
-12e-x = -1
12e-x = 1
e-x = 1/12
ln(e-x) = ln(1/12)
x = -ln(1/12)
x = -2.485
5
Step-by-step explanation:
3x -12 = -36
-36 ÷ -3 = 12
-7 + 12 = 5