So after 5.5b = 30b -12.5b the equation simplifies to 5.5b = 17.5b -17.5b = -17.5b     Then bringing the 'b's to one side you have -12b = 0 or alternatively 0 = 12b (by subtracting 5.5b from both s...

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3. Weird answer for "Solving systems of linear equations" in SAT math section