Solve for fff. -f+2+4f =8 -3f−f+2+4f=8−3f
Mathematics · College · Thu Feb 04 2021
Answered on
Given the numerical equation:
-f + 2 + 4f = 9
Solve for ff.
Solution:
We simplify first the values of the first equation and the second equation, then we equate the values into one single solution by multiplying as the condition stated
-f + 2+ 4f = 9
Transpose 9 to the other side of the equation, hence it must be taken to note that in transposing a number, the sign changes.
= 3f + 2 - 9
= 3f - 7
-3f - f + 2 + 4f = 8 - 3f
= -3f + 3f - f + 2 - 8 + 4f
= 3f - 6
= (3f - 7)(3f - 6)
= 9f^2 -18f - 21f + 42
= 9f^2 - 39f + 42
Final answer:
= 9f^2 - 39f + 42