1) х = 12/3х = 4
2) 5х - 4.5 = 3х + 2.55х - 3х = 2.5 + 4.52х = 7х = 7/2х = 3.5
3) 7х - (х + 3) = 3(2х - 1)7х - х - 3 = 6х - 36х - 3 = 6х - 30 = 0
This means that the equation is always true, so it has an infinite number of solutions.
1) х = 12/3
х = 4
2) 5х - 4.5 = 3х + 2.5
5х - 3х = 2.5 + 4.5
2х = 7
х = 7/2
х = 3.5
3) 7х - (х + 3) = 3(2х - 1)
7х - х - 3 = 6х - 3
6х - 3 = 6х - 3
0 = 0
This means that the equation is always true, so it has an infinite number of solutions.