12 (4x-5) 52=10

What number can go for x to make the solution true?

x=

5, 12, 8, or 20

12 (4x-5) 52=10

Say x=5. Replace the x with 5.

12 (4*5-5) 52=?

12 (20-5) 52=?

12 (15) 52=?

180*52=9360

x does not equal 5

Now lets try 12.

12 (4*12-5) 52=?

12 (48-5) 52=?

12 (43) 52=?

516*52=26832

x does not equal 12

Repeat this process with the other two numbers. Just replace x with one of the numbers. Make sure there is no negative signs on any of the numbers. All signs are crucial.

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