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Algebra does use numbers. I learned to move the numbers to one side and the variables to the other. 10x+7 = -2x+31 Move 7 to the other side (picking up a minu
by texaslonghorn5 4y ago
Algebra does use numbers. I learned to move the numbers to one side and the variables to the other.
10x+7 = -2x+31
Move 7 to the other side (picking up a minus sign)
10x = -2x + 31 - 7 = -2x + 24
Move -2x to the other side (flipping sign)
12x = 24
Recover 12*2 = 24 via memorization, quick division (though not long division), or whatever method
Therefore, x = 2. Then I drew a square and was done.
- snvzz 4y ago>Then I drew a square and was done. I don't get this part. You mean to highlight the end result? In that case, it would, most of the time, be a rectangle (or try to be).
- texaslonghorn5 4y agoI was joking, I meant the QED box.
- snvzz 4y agoI know about QED, but I am not familiar with the concept of "QED box". A cursory web search yielded nothing.
- ludwigschubert 4y agoIt’s a symbol that goes by many names: the tombstone, end-of-proof, or Q.E.D. "∎"
- snvzz 4y agoInteresting. I wasn't familiar with this, despite being a graduate. Its use might depend wildly on where.