Question

Show me how to work the equation 30-f+8f=30​

Answer 1

f=0

Explanation:

30-f+8f=30

30+7f=30 (combine like terms, in this case -f stands for -1 so (-1+8=7) )

7f=0 (divide by 7)

f=0 (any number divided by 0 is 0)

Answer 2

30-f+8f=30​

30+7f=30

Move +30 to the right side. Sign changes from +30 to -30.

30-30+7f=30-30

7f=0

Divde by 7

7f/7=0/7

Cross out 7 and 7, divide by 7. Becomes 1*1*f=f

f=0

Answer: f=0