1) х = 8.2 + 5.7
Х = 13.9
2) 4х - 2х = 9.4 - 4.5
2х = 4.9
х = 4.9 : 2
х = 2.45
3) 2.7 + 5х = 14.4 + 3х
5х - 3х = 14.4 - 2.7
2х = 11.7
х = 11.7 : 2
х = 5.85
4) 2 + х = 0. или. х - 4 = 0. или. х + 8 = 0
х = 0 - 2. х = 0 + 4. х = 0 - 8
х = -2. х = 4. х = -8
5) 3х - 7.5 = 3х - 1.2
3х - 3х = 7.5 - 1.2
0 = 6.3
нет корней
1) х = 8.2 + 5.7
Х = 13.9
2) 4х - 2х = 9.4 - 4.5
2х = 4.9
х = 4.9 : 2
х = 2.45
3) 2.7 + 5х = 14.4 + 3х
5х - 3х = 14.4 - 2.7
2х = 11.7
х = 11.7 : 2
х = 5.85
4) 2 + х = 0. или. х - 4 = 0. или. х + 8 = 0
х = 0 - 2. х = 0 + 4. х = 0 - 8
х = -2. х = 4. х = -8
5) 3х - 7.5 = 3х - 1.2
3х - 3х = 7.5 - 1.2
0 = 6.3
нет корней