If it's not what You are looking for type in the equation solver your own equation and let us solve it.
12x+3x=4
We move all terms to the left:
12x+3x-(4)=0
We add all the numbers together, and all the variables
15x-4=0
We move all terms containing x to the left, all other terms to the right
15x=4
x=4/15
x=4/15
| 16x-64=-16x | | 16p+7=2-7p | | 44=w/2+17 | | -12x+18+2x=54 | | 2k-24=8 | | 50=25x= | | 100=40+x | | 3m+1=24 | | 2r+48=6 | | x+3.26=7.95 | | 4f+18=34 | | -29+17x=27+19x | | 7=r+23/5 | | 2x-18=11x | | 6x+1=6x-6 | | -245=5(2x+7) | | 3x=-2=7 | | 45+60=x | | -x+6=-(x-6) | | -2x+45=11 | | 11x–12-2x=60 | | -2x-3=-8x+9 | | -3.51-x=0.69 | | 2(j-71)=40 | | m-3=3m-13 | | -w/2+8=20 | | 756=(x+7)^ | | -2(-7+6a)+8(1-3a)=-50 | | 9-3y=3-y | | 12n-5=9-2 | | (21/2x)=10 | | x+3=1/4+6 |