If it's not what You are looking for type in the equation solver your own equation and let us solve it.
3x+7x+15=0
We add all the numbers together, and all the variables
10x+15=0
We move all terms containing x to the left, all other terms to the right
10x=-15
x=-15/10
x=-1+1/2
| 3b+36=0 | | 32x-3=14x-1 | | 3x+90=70+5x | | 40=x32 | | 15x+7=100 | | 4(3y+8)=-52 | | 8(t-5)+6t=7(2t+4)-10 | | 5e+10e-6e=-27 | | 13)-15=4m+5 | | 84-x=32 | | 27+x=86 | | 4p+5=21(p=0) | | Y=2x+5=0 | | 3^(2x+1)-243=0 | | 2^(-x)=0.4 | | 3x+8-3=2x-2+3 | | 5x-2x+x=3x-8 | | 7b+9=3b+29 | | 4d=82 | | 4x=4+16 | | -3x+3=23 | | 3/4x-9=5x-60 | | 9f=32 | | 4+6/78-70=x | | 5/6*x=x-240 | | n-11=5.5 | | n+13=36 | | 11-3x+4x=9 | | 5w+3(w+4)=20 | | 2p/3-p/5=2/3 | | 200=3^-x | | 100x^2+110+10=0 |