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carlener
Jan 25, 2011, 12:37 PM
if 2(x-7)+4 = x then x=10.
write the algelbraic proof for this problem?

jcaron2
Jan 25, 2011, 01:01 PM
Just plug in 10 in place of x in the equation. As long as the result turns out to be true, that proves x really does equal 10.

2(10-7) + 4 = 10 ?