Answer:
The solution is given below:
Step-by-step explanation:

As we know the value of k and r so the equation will be





4x+(-3)=-2x-5
4x-3 = -2x-5
add 2x to each side
6x-3 =-5
add 3 to each side
6x = -2
divide by 6
x = -2/6
divide top and bottom by 2
x = -1/3
To get the answer, divide 1 by 8
Which equals 0.125
And that is your answer.
Hope I Helped You!!! :-)
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Its 3.8 because if you add 5.9 and 10.3 is 16.2, and if you subtract it by 20, it should equal 3.8.