F(-x) = 2/-x/ + 3(-x) = 2/x/ - 3x;
Janes weight = x
Twelve pounds less than twice janes weight is 270 pounds
12 less than 2x is 270
2x -12 = 270 (add 12 to each side)
2x = 270 + 12
2x = 282 (divide 2 from each side)
x = 282/2
x = 141
The answer is 141 pounds
John spent 30 on six cars 5 times 6 = 30