Answer:
3x + 1 + 2x = 5x + 3 ---> original equation
combine the like terms (ex: x+3x)
5x + 1 = 5x + 3
Bring 1 to the other side(becomes negative)
5x = 5x + 3 - 1
5x = 5x + 2
same thing for the x terms!
5x - 5x = 2
0x = 2
x = 2/0
Answer undefined
Hence the answer is undefined