1) -5х+9(-1+2х)=9х-1
– 5x – 9 + 18x = 9x – 1
– 5x + 18x – 9x = – 1 + 9
4x = 8
x = 2
2) (х-6)2=(7-х)2
раскроем скобки
2x-12 = 14-2x
4x-26 = 0
4x = 26
x = 26/4
х=6,5
1) -5х+9(-1+2х)=9х-1
– 5x – 9 + 18x = 9x – 1
– 5x + 18x – 9x = – 1 + 9
4x = 8
x = 2
2) (х-6)2=(7-х)2
раскроем скобки
2x-12 = 14-2x
4x-26 = 0
4x = 26
x = 26/4
х=6,5