Question

Which one has 1 solution I. 7x - 3 = 7x II. 9x + 1 = 9x + 1 III. 2x + 4 = 2x - 4 IV. 4x - 5 = 6x + 3

Answer 1

IV

Explanation:

I has no solution since you can't subtract 3 from a number and get the same number as the difference.

II has infinite amount of solutions.

III has no solutions since a 4 more than a number doesn't equal 4 less than a number.

IV: 4x-5=6x+3

4x=6x+8

-2x=8

x=-4 ==> 1 solution