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Algebra
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–10 + 3x + 6x = –10
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to solve for x from –10 + 3x + 6x = –10 add 10 to both sides +10 +10 what do you get? :)
3x+6x=20
not quite -10 + 10 = 10 - 10 = 0 right?
right
then 0 divided by (any number) = 0 so no matter what now, x will equal 0
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