Question

срочно!!!!! решите уравнение: 1) 9 (2x-1)-5(11-x)=3(x+4) 2) 5x -26=12x-7(x-4)

Answer 1

Объяснение:

1)

$9(2x - 1) - 5(11 - x) = 3(x + 4) \\ 18x - 9 - 55 + 5x = 3x + 12 \\ 23x - 64 = 3x + 1 2 \\ 23x - 3x = 12 + 64 \\ 20x = 12 + 6 4 \\ 20x = 76 \div 20 \\ x = \frac{19}{5} = 3 \frac{4}{5} = 3.8$

2)

$5x - 26 = 12x - 7(x - 4) \\ 5x - 26 = 12x - 7x + 28 \\ 5x - 26 = 5x + 28 \\ - 26 = 28$

х ∈ ∅