Exponential equation

In the set R solve the equation:

7−5+19x=43−20x



Correct result:

x =  0.21

Solution:

x=3⋅ln⁡(4)−(−5)⋅ln⁡(7)19⋅ln⁡(7)−(−20)⋅ln⁡(4)≐0.21

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