3(x+4)=15, 4x+5=5x-4
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Step-by-step explanation:
3x + 45 = 15
3x = 15-45
3x = -30
X = -30/3
X = -10
4x+5 = 5x-4
4x-5x = -4-5
-x = -9
X = 9
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