Me ayudan con esto? y la explicación, xfa <3

X − 4 = 5 − 2X

Choose a second initial value that is 0.01 greater than the initial value from question 9. iterate it using the function, f, ten times. if necessary, you can round your results to the nearest ten-thousandth.

An ulcer medication has 300 milligrams in 2 tablets. how many milligrams are in 3 tablets?

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?