Abby1400 Abby1400

20-03-2017
Mathematics

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whats the value of x?
(12x+12) + (3x+19) = 165

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Аноним Аноним

20-03-2017

for: (12x+12) * (3x+19) = 165
36x² + 228x + 36x + 228 = 165
36x² + 264x + 63 = 0

x₁= (-264 + 246) / 72 = -0.25
x₂= (-264 - 246) / 72 = -7.08

for: (12x + 12) + (3x + 19) = 165
12x + 12 + 3x + 19 = 165
15x + 31= 165
15x = 134
x = 8.9

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