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(-3/4)*x-7 = -6*x-(49/16) // + -6*x-(49/16)
(-3/4)*x-(-6*x)+49/16-7 = 0
(-3/4)*x+6*x+49/16-7 = 0
21/4*x-63/16 = 0 // + 63/16
21/4*x = 63/16 // : 21/4
x = 63/16/21/4
x = 3/4
x = 3/4
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