Question

Select all the equations that have {6} as its solution set.

43-4x = 3x - 1
x² +2=7x-4
15-x=54/x
08+3x = 6x -10

Answer 1

I would plug in 6 into every equation.
After plugging and simplifying the numbers a little bit (for example 4 times 6 = 24), this is what I got.
First, 43-24 doesn’t equal 18-1 bc 19 doesn’t equal 17.
Second, 36 + 2 does equal 42-4 bc 38 = 38.
Third, 15-6 does equal 54/6 bc 9 = 9.
Fourth, 8 + 18 does equal 36-10 bc 26=26. (I’m only not sure why there’s a 0 in front of the 8, but I’m taking it as a regular 8.)
So I would say the last three are right, they do have 6 in their solution sets.