Вот.................................
(1 + 2): 3 = 1
1 * 2 + 3 - 4 =1
((1+2) : 3 + 4) : 5 =1
1 * 2 - 3 :(4 +5- 6) =1
1 * 2 + (3 + 4 +5) - (6 + 7) =1
((1 + 2): 3)* (4 + 5 + 6): ( 7+8) =1
√2+x=4-x
x+x=4-<span>√2
2x=4-</span><span>√2
x=2- </span><span>√2/2</span>