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Math word problem question? Is this a gravity denier straw man? Who was the person that found the value of infinity? My cursor won't move and the computer is locked. What do I do? 3a - 4b = 7 2a - 3b = 6 Based on the equations, which of the following equations are true. A) b= a+1 B) b= a-1 C) b= -a + 1 D) -a - 1?