Discussion Topic Like fractions, rational expressions can be added, subtracted, multiplied, and divided
When dealing with two rational expressions that have different denominators, how
would you find a common denominator? What effect would that have on the numerators
of the expressions? Would the same idea work for simple numeric fractions? Why or
why not?

Given two rational expressions, how would the process you follow to multiply or divide
them differ from multiplying or dividing two numeric fractions?

-7/8

step-by-step explanation:

instead of subtracting you add the -6/8 and -1/8

6mm^3 or .6cm^3

      216

      /   \

  36     6

  /   \     /

6     6   6

factor trees are nice.

step by step resolutions

1) n+n+1+n+2=51

3n+3=51

3n=48

n=16

the three numbers are 16, 17 and 18.

2) x+15=4x

3x=15

x=5

radha is now 5 years old

3) the two digits are x and y.

y=3x

(10x+y)+(10y+x)=88

y=3x

11x+11y=88

y=3x

x+y=8

x+3x=8

x=2

the original number can be either 28 or 82.

4) n+(n+2)+(n+4)=48

3n+6=48

3n=42

n=14

the numbers are 14, 16 and 18.

5) y=x+3

10y+x+10x+y=143

y=x+3

11x+11y=143

y=x+3

x+y=13

x+x+3=13

2x=10

x=5

the original number can be 57 or 75.

hope this !

-1

step-by-step explanation: