x-1 x-2 x-3
____ – ____ – ____ -3 = 0
13 12 11
Các bạn giải giúp mk với ạ
x-1 x-2 x-3
____ – ____ – ____ -3 = 0
13 12 11
Các bạn giải giúp mk với ạ
$\frac{x-1}{13}$ – $\frac{x-2}{12}$ – $\frac{x-3}{11}$ – 3 = 0
⇔ $\frac{12.11.(x-1)}{1716}$ – $\frac{13.11.(x-2)}{1716}$ – $\frac{13.12.(x-3)}{1716}$ – 5148/1716 = 0
⇔ $\frac{132.(x-1)}{1716}$ – $\frac{143.(x-2)}{1716}$ – $\frac{156.(x-3)}{1716}$ – 5148/1716 = 0
⇔ $\frac{132.x-132}{1716}$ – $\frac{143.x-286}{1716}$ – $\frac{156.x-468}{1716}$ – 5148/1716 = 0
⇔ $\frac{132.x-132-(143.x – 286) – (156.x – 468) – 5148}{1716}$ = 0
⇔ $\frac{132.x-132-143.x + 286 – 156.x + 468 – 5148}{1716}$ = 0
⇔ $\frac{-167.x-4526}{1716}$ = 0
⇔ -167.x – 4526 = 0
⇔ -167.x = 4526
⇔ x = -4526/167
Vậy x = -4526/167