Ten is Twenty

Algebra Level 1

Here is a proof that 10=20:10 = 20:

Step 1: Consider the system of equations 2x+4y=20x+2y=5.2x + 4y = 20 \\ x + 2 y = 5. Step 2: We can rewrite the second equation as x=52y. x = 5 - 2y. Step 3: Now, plugging x=52yx=5 - 2y into the first equation, we get 2(52y)+4y=20. 2(5-2y) + 4y = 20. Step 4: Simplifying, we have 104y+4y=20. 10 - 4y + 4y = 20. Step 5: Cancelling out the two 4y4y's, we get 10=20.10 = 20.

Where did the proof go wrong?

×

Problem Loading...

Note Loading...

Set Loading...