Решите ур-ие. 1) 1/3х + 5/7х = 2/7 - 1/9 х

Question

Решите ур-ие.

1) 1/3х + 5/7х = 2/7 - 1/9 х

Answer 1

1/3x+5/7x=2/7-1/9. 1/3x+5/7x+1/9x=2/7. 21/63x+45/63x+7/63x=2/7. 73/63x=2/7. x=2/7÷73/63. x=18/73