Question

3x+5 - x+1=1
   5      3

Answer 1

(3x+5)3-5(x+1)=3*5
9x+15-5x-5=15
4x+10=15
4x=5
x=5/4

Answer 2

3(3х + 5) - 5(х+1) = 15
9х +15 - 5х -5 = 15
9х -5х = -15 + 5 +15
4х = 5
х=1,25