No he was not right because if you had -7 and -5 the difference is 7 + 5 which equals 12.
You need to get x by itself. Add 6 to both sides.
x = 14
Answer:
(-5x)^4
Step-by-step explanation:
Ur output value is f(x).....so to do this problem u need to sub in 2/3 for f(x) and solve for the input value which is x
f(x) = -1/3x + 7
2/3 = -1/3x + 7 ...multiply everything by 3
2 = -x + 21
2 - 21 = - x
- 19 = -x
19 = x <== ur output
