Відповідь:
11)
12)
13) 2
Покрокове пояснення:
11) 6(3x-9) = 7(2x+5)
18x - 54 = 14x + 35
4x = 89
x =
13)
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Answers & Comments
Відповідь:
11)![\frac{89}{4} \frac{89}{4}](https://tex.z-dn.net/?f=%5Cfrac%7B89%7D%7B4%7D)
12)![\frac{11}{25} \frac{11}{25}](https://tex.z-dn.net/?f=%5Cfrac%7B11%7D%7B25%7D)
13) 2
Покрокове пояснення:
11) 6(3x-9) = 7(2x+5)
18x - 54 = 14x + 35
4x = 89
x =![\frac{89}{4} \frac{89}{4}](https://tex.z-dn.net/?f=%5Cfrac%7B89%7D%7B4%7D)
12)![\frac{x-3}{4} - \frac{x-5}{3} = \frac{3(x-3)-4(x-5)}{12} = \frac{3x-9-4x+20}{12} = \frac{11-x}{12} = >\frac{11-x}{12} = 2x => 24x = 11-x => 25x = 11 => x=\frac{11}{25} \frac{x-3}{4} - \frac{x-5}{3} = \frac{3(x-3)-4(x-5)}{12} = \frac{3x-9-4x+20}{12} = \frac{11-x}{12} = >\frac{11-x}{12} = 2x => 24x = 11-x => 25x = 11 => x=\frac{11}{25}](https://tex.z-dn.net/?f=%5Cfrac%7Bx-3%7D%7B4%7D%20%20-%20%5Cfrac%7Bx-5%7D%7B3%7D%20%3D%20%5Cfrac%7B3%28x-3%29-4%28x-5%29%7D%7B12%7D%20%3D%20%5Cfrac%7B3x-9-4x%2B20%7D%7B12%7D%20%20%3D%20%5Cfrac%7B11-x%7D%7B12%7D%20%3D%20%3E%5Cfrac%7B11-x%7D%7B12%7D%20%3D%202x%20%3D%3E%2024x%20%3D%2011-x%20%3D%3E%2025x%20%3D%2011%20%3D%3E%20x%3D%5Cfrac%7B11%7D%7B25%7D)
13)![2 - (x^2 - 6x + 9) = 3 - (4 - 4x + x^2) 2 - (x^2 - 6x + 9) = 3 - (4 - 4x + x^2)](https://tex.z-dn.net/?f=2%20-%20%28x%5E2%20-%206x%20%2B%209%29%20%3D%203%20-%20%284%20-%204x%20%2B%20x%5E2%29)