Question

3,5 x + 1 = 3 + 3,1 x​

Answer 1

3,5x + 1 = 3 + 3,1x -> 3,5x - 3,1x + 1 = 3 -> 0,4x + 1 = 3 -> 0,4x = 3 -1 -> 0,4x = 2 -> x = 2/0,4 -> X = 5

Espero ter ajudado :)

Answer 2

3,5x+1=3+3,1x
3,5x-3,1x=3-1
0,4x=2
x=2/0,4
x=5