Solve for X:
81x−43+91=−82+43x−21x
To solve the given linear equation 81x−43+91=−82+43x−21x, we need to follow these steps:
First, simplify both sides of the equation:
On the left-hand side, which is 81x−43+91:
- Simplifying, it remains 81x−43+91.
- Convert −43+91 to a common denominator. The least common multiple of 4 and 9 is 36.
- −43=−3627 and 91=364, so −3627+364=−3623.
- The left-hand side is now 81x−3623.
Now, simplify the right-hand side, which is −82+43x−21x:
- −82=−41.
- Simplify 43x−21x. The common denominator for 43 and 21 is 4.
- So 43x−21x=43x−42x=41x.
- The right-hand side is now −41+41x.
Combine like terms across the equation:
- We aim to move all terms involving x to one side and constants to the other.
- Subtract 41x from both sides: 81x−41x−3623=−41.
- Bring −3623 to the right side: 81x−41x=−41+3623.
Simplify and solve for x:
- 81x−41x=81x−82x=−81x.
- Add 3623 to −41, by finding a common denominator of 36.
- −41=−369, so −369+3623=3614=187.
- Now we have: −81x=187.
- Multiply both sides by −8 to solve for x: (−8)⋅(−81x)=(−8)⋅(187).
- This simplifies to x=−1856=−928.
- −928 can be rewritten as a mixed number: −928=−391.
Therefore, the solution is:
x=−391.