Solution - Adding, subtracting and finding the least common multiple
Other Ways to Solve:
Step by Step Solution
Rearrange:
Rearrange the equation by subtracting what is to the right of the greater than sign from both sides of the inequality :
1/2*(x+1)-(1/3*(x+2))>0
Step by step solution :
Step 1 :
1
Simplify —
3
Equation at the end of step 1 :
1 1
(— • (x + 1)) - (— • (x + 2)) > 0
2 3
Step 2 :
Equation at the end of step 2 :
1 (x + 2)
(— • (x + 1)) - ——————— > 0
2 3
Step 3 :
1
Simplify —
2
Equation at the end of step 3 :
1 (x + 2)
(— • (x + 1)) - ——————— > 0
2 3
Step 4 :
Equation at the end of step 4 :
(x + 1) (x + 2)
——————— - ——————— > 0
2 3
Step 5 :
Calculating the Least Common Multiple :
5.1 Find the Least Common Multiple
The left denominator is : 2
The right denominator is : 3
| Prime Factor | Left Denominator | Right Denominator | L.C.M = Max {Left,Right} |
|---|---|---|---|
| 2 | 1 | 0 | 1 |
| 3 | 0 | 1 | 1 |
| Product of all Prime Factors | 2 | 3 | 6 |
Least Common Multiple:
6
Calculating Multipliers :
5.2 Calculate multipliers for the two fractions
Denote the Least Common Multiple by L.C.M
Denote the Left Multiplier by Left_M
Denote the Right Multiplier by Right_M
Denote the Left Deniminator by L_Deno
Denote the Right Multiplier by R_Deno
Left_M = L.C.M / L_Deno = 3
Right_M = L.C.M / R_Deno = 2
Making Equivalent Fractions :
5.3 Rewrite the two fractions into equivalent fractions
Two fractions are called equivalent if they have the same numeric value.
For example : 1/2 and 2/4 are equivalent, y/(y+1)2 and (y2+y)/(y+1)3 are equivalent as well.
To calculate equivalent fraction , multiply the Numerator of each fraction, by its respective Multiplier.
L. Mult. • L. Num. (x+1) • 3 —————————————————— = ————————— L.C.M 6 R. Mult. • R. Num. (x+2) • 2 —————————————————— = ————————— L.C.M 6
Adding fractions that have a common denominator :
5.4 Adding up the two equivalent fractions
Add the two equivalent fractions which now have a common denominator
Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:
(x+1) • 3 - ((x+2) • 2) x - 1
——————————————————————— = —————
6 6
Equation at the end of step 5 :
x - 1
————— > 0
6
Step 6 :
6.1 Multiply both sides by 6
Solve Basic Inequality :
6.2 Add 1 to both sides
x > 1
Inequality Plot :
6.3 Inequality plot for
0.167 x - 0.167 > 0
One solution was found :
x > 1How did we do?
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