If it's not what You are looking for type in the equation solver your own equation and let us solve it.
13x+4x-15x=20
We move all terms to the left:
13x+4x-15x-(20)=0
We add all the numbers together, and all the variables
2x-20=0
We move all terms containing x to the left, all other terms to the right
2x=20
x=20/2
x=10
| X2-9x+19=0 | | 6h-4h+4=20 | | 6=-3r+2r | | (-4)=x+1 | | 7j-2j-5j+3j=18 | | 6(x-2)-(2x-1=2 | | 25.6=-3.3x | | 6^2+x^2=x+2^2 | | 11u+5u-14u=20 | | 3z−-16z+10=-9 | | 77+7x+42=180 | | 4x^2-11=89 | | 1/2-1/8q=9-1/6+4 | | -1=-x+-2 | | -9k−12k−-12k+19k−15k=20 | | 15a-16a+2a=9 | | 3=(-2x+70) | | 102+10x+72=180 | | 4j+2j+2j-3j-4j=12 | | 4c-4=44 | | 17=x/2+13 | | .75x^2-62x+961=0 | | 2x+6x=96 | | 4x2-10x+12=0 | | 9y-5y-7=65.12. | | 7m-5m=2 | | -8.2c-30=-46.4 | | 7a+-7a+-3a+9a=-12 | | 13x-22=2(9x+10 | | 4=f-1/3 | | 2b/92=4 | | x+3x+3x=96 |