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Earn +20 ptsQ: 3 x 7 plus y equals 21?
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What is X2 plus 10x plus 21 equals?
x2 + 10x + 21 = (x + 3)(x + 7)
IF 2 plus 3 equals 10 7 plus 2 equals 63 6 plus 5 equals 66 8 plus 4 equals 96 13 plus 8 equals?
273 13+8 = 21 and 13*21 = 273
What is 3n plus 7 equals 28?
n = 7. 3(7) + 7 = 28. 21+7=28
What mistake was made in this equation 3x plus 7 equals -4x plus 28 -x plus 7 equals 28 -x equals 21 x equals -21?
3x + 7 = -4x + 28 implies 7x + 7 = 28
Where should the parentheses in 7 plus 7 x 3 equals 4 x 7?
7+(7*3) because 7*3=21 and 21+7=28, which is equal to 28, the product of 4*7.
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