Solve for f, what is f

f=1

Step-by-step explanation:

To solve for f, we need to get f by itself. To do this, we need to move all the numbers to one side of the equation, and all the variables to the other

-f+2+4f=8-3f

Combine like terms

(-f+4f) +2=8-3f

3f+2=8-3f

Add 3f to both sides

3f+3f+2=8-3f+3f

6f+2=8

Subtract 2 from both sides

6f+2-2=8-2

6f=6

Now all the numbers are one sides, and the variables are on the other. f is still not completely by itself, it is still being multiplied by 6. To reverse this, divide both sides by 5

6f/6= 6/6

f=1

38.5

step-by-step explanation:

lets say, first number = r

second number = 3r+7

total = 49

(r)+(3r+7)= 49

4r+7 = 49

4r = 42

r = 42/4

r= 10.5

3r+7 = 3(10.5)+7 = 38.5

hope this

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,