yes
cause like when u do x plus x plus x , its like 1 plus 1 plus 1
so its 3x just like 3
if 3x+5=x+19 then x=7
X= 5
X equals 9.
you mean: x+3x+3=x+18 so x=5
x = 7 and 2/3
3x+5=20 x=5 since 5x3+5=20
3x + 5 = 6x + 23 -3x = 18 x = -6
x = 4
x = 2
x = 12
x+5 = 3x+15 x-3x = 15-5 -2x = 10 x = -5
3x