Question

2(4x-y)+3(4x+y)=32
5(4x-y)-2(4 x +y) =4
решите пожалуйста систему уравнений ,срочно !!! Даю 20 баллов сразу же

Answer 1

$8x - 2y + 12x + 3y = 32 \\ 20x - 5y - 8x - 2y = 4 \\ = = = = = = = = = \\ 20x + y = 32 \\ 12x - 7y = 4 \\ = = = = = = = = = \\ y = 32 - 20x \\ 12x - 7(32 - 20x) = 4 \\ 12x - 224 + 140x = 4 \\ 152x = 228 \\ x = 1.5 \\ = = = = = = = = \\ y = 32 - 20x = 32 - 20 \times 1.5 = 2$
Ответ: х=1,5, у=2