Answer: b and c
a) 5x + 5 = -4x - 5
9x = - 10
x = -10/9
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b) - 4x + 5 = -4x - 4
0x = -9 (no solution)
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c) -4x + 5 = -4x - 5
0x = -10 (no solution)
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d) 4x + 5 = -4x + 5
8x = 0
x = 0
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hope it helps.
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