12 + x = -3(4 – x)
Solve the problem...
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Which simplifys to a+ b? a-(1-b)+1 -(1-a)-b+1 (a--1) -1)+1
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Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.
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Which is the equation of a line perpendicular to the line with the equation 3x+4y=8
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