Решите уровнение плиз1123

1) 10 - 7/10 × х = 1/2 3/10х = 1/2 10/3 × 3/10х = 10/3 × 1/2 х = 5/3 2) 5+4/20 × х = 4/5 9/20х =4/5 20/9 × 9/20х = 20/9 × 4/5 х = 4/9 × 4 х = 16/9 3) (3/8 + 3/4)х = 1/3 3+6/8 × х = 1/3 9/8х = 1/3 8/9 × 9/8х = 8/9 × 1/3 х = 8/27 4)(1/6 - 5/6)х = 3/4 1-5/6 × х = 3/4 (-4/6)х = 3/4 -2/3 х = 3/4 -3/2 × 2/3 х = 3/2 × 3/4 -х = 9/8 х = -9/8