Answer: x = -t/(a+t+r)
Explanation:
We can solve for x by isolating it on one side of the equation:
-a x = x r + t
Subtracting x r from both sides, we get:
-a x - x r = t
Factoring out x on the left-hand side, we get:
x (-a - r) = t
Dividing both sides by (-a - r), we get:
x = t / (-a - r)
Multiplying the numerator and denominator of the right-hand side by -1, we get:
x = -t / (a + r + t)
Therefore, the value of x is -t / (a + r + t).