If it's not what You are looking for type in the equation solver your own equation and let us solve it.
2x+21=77
We move all terms to the left:
2x+21-(77)=0
We add all the numbers together, and all the variables
2x-56=0
We move all terms containing x to the left, all other terms to the right
2x=56
x=56/2
x=28
| 7h–4=10 | | 2x-13=3(x-1)=13 | | -70-7m=3m | | 3=6=5x+2 | | 2x-3/3=1 | | 16/7x=-8/12 | | 4x+5x-9=4 | | 2x-32=76 | | .11x=25000 | | 6m+2=38,7 | | J3x+5x+4-x+7=88 | | 3=12+w | | 2/3k+9=5 | | 6(x+1)=12x | | 25t^2=50t+25 | | 17r+7=7 | | 8(v-82)=64 | | 25^2=50t+25 | | 5x+8+3x+4=-40 | | (5x+23)=(4x-5)=180 | | w+15/4=7 | | 1/2(1-c)=11/6c | | 5x+6x=350 | | -q=-690 | | f/3+12=16 | | -670=-10q | | -30t=-840 | | 8m+60=964 | | 8=f+17/3 | | 23t=-299 | | p+14=-967 | | -30k=-390 |