If it's not what You are looking for type in the equation solver your own equation and let us solve it.
12-3=3x
We move all terms to the left:
12-3-(3x)=0
We add all the numbers together, and all the variables
-3x+9=0
We move all terms containing x to the left, all other terms to the right
-3x=-9
x=-9/-3
x=+3
| x(4x)=8(x+10) | | 9x-5x=85 | | 10=c-2 | | (3x+10)+3x=90 | | 3y-2=-7y+8 | | 7+9f=49.6 | | -3x^2=99 | | 6x-2=15x-14 | | -8=4(3t+7) | | s-15s+10s=-6 | | 20y+9=4 | | s−15s+10s=-6 | | 3r-r-r-r+3r=15 | | 23+58=x+28 | | 60+0.06k=20+0.70k | | -0.65p-0.35p=0.35 | | 3r-r−r-r+3r=15 | | 3r−r−r−r+3r=15 | | 3b=5=-13 | | 2+6(x-4)=3x-18-3x | | 0.25x+3.5=2(0.5x+0.75) | | 4v-3v-v+2v+3v=20 | | 2(y-1)=3y | | 4v−3v−v+2v+3v=20 | | 3x=10=7x-6 | | 1/4x+3+1/2=2(1/2x+3/4) | | 50x=2804*2.86 | | 4x+16=3x+15 | | 9x-1=1.5x+6.5 | | 2(25-y)+2y=50 | | 61=9x+3-7 | | 9+6h=11+5h |