find x value in which 2x+7/4=-15
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8x \div 4 + 7 \div 4 \: = - 15 \\ < 8x + 7 > \div 4 = - 15 \\ 8x + 7 = - 15 \times 4 \\ 8x + 7 = - 60 \\ 8x = - 60 - 7 \\ 8x = -67 \\ x = - 67 \div 8 \\ x = 8.375
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