If it's not what You are looking for type in the equation solver your own equation and let us solve it.
3+x+2x+1=19
We move all terms to the left:
3+x+2x+1-(19)=0
We add all the numbers together, and all the variables
3x-15=0
We move all terms containing x to the left, all other terms to the right
3x=15
x=15/3
x=5
| 5x-6=2+(3x-4) | | -8.2=m4.1 | | x+6=3(x+5)−7 | | 140=4x+72 | | -(12)/(7)x=-36 | | -10+5y=10+3y | | -9b-3=3-3b | | h/4-5=5 | | (1x/5x)-40=2x-4 | | x-5=1/4 | | 2-5(a+3)=27 | | 6x-5-3x+3=0 | | 12p-4p+3=0 | | (3)/(4)+(4m)/(9)=(47)/(36) | | 5x+1/2=7/8 | | 80+(10+9)w=175 | | 5a-4(3a)=14 | | 10+x3/4=40 | | -8m-4=-12 | | 20+1/3n=5.6+1/15n | | 5+tt=12 | | -8x+5=-155-13x | | 30=5(2x+3)-5x | | -6m=8-5m | | -10g=-7-3g | | 3h-29=16 | | 2(x+7)+4x=5(x-8) | | n/7+2=-8 | | -8r=10-10r | | |x-7.5|=3.5 | | 15/8n=23/5 | | 4(x+4)=-20-x |