Решите уравнение и выполните проверку: 1. 2x=18-4x - вопрос №8563855121842945367389234 от Eerow 27.12.2021 11:34

Question

Математика: Решите уравнение и выполните проверку: 1. 2x=18-4x 2. 9x+45 = 36+7x 3. 89x-23=48-5x

Eerow · Answer

1.2x = 18-4x2x+4x = 186x = 18x = 18:6x = 3xx-Проверка:2x = 2*3 = 618-4x = 18-4*3 = 18-12 = 66 = 62.9x+45 = 36+7x9x-7x = 36-452x = -9x = -9:2x = -4,5Проверка:9x+45 = 9*(-4,5)+45 = -40,5+45 = 4,536+7x = 36+7*(-4,5) = 36-31,5 = 4,54,5 = 4,53.89x-23 = 48-5x89x+5x = 48+2394x = 71x = 71/94Проверка:89x-23 = 89*71/94-23 = 6319/94-2162/94 = 4157/91 = 45 62/9148-5x = 48-5*71/94 = 4512/94-355/94 = 4157/91 = 45 62/9145 62/91 = 45 62/91...