To determine which equation has the
solution x = -3, we'll substitute x = -3 into each equation and see which one results
in a true statement.
Option A: 2x + 8 = x – 5
2 × (-3) + 8 = -3 –
5
-6 + 8 = -8
2 ≠ -8
This equation is not true when x = -3.
Option B: 3x – 4 = 5x + 2
3 × (-3) – 4 = 5 × (-3) + 2
-9 – 4 = -15 + 2
-13 = -13
This equation is true when x = -3.
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