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you have to multiply everything in the parentheses by 21, so your new equation is 42-21x+12x=44 then reduce your x's on the left side, so -21+12 is -9, so your next equation would be 42-9x=44 then subtract 42 from each side to get x by itself, so then you get -9x=2 then divide each side by -9, so then x=2/-9!
ok so first things first combine the like terms. so now its 21 x 2 +11 = 44 ( you added -x which is -1x + 12) then you do 42 + 11 = 44 (21 x 2 =42) 52 = 44 (42+11) and if the answer is what i think it is, it should be no, it is not equal. if not then idk but thats how you solve it.
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