If it's not what You are looking for type in the equation solver your own equation and let us solve it.
n+n=126
We move all terms to the left:
n+n-(126)=0
We add all the numbers together, and all the variables
2n-126=0
We move all terms containing n to the left, all other terms to the right
2n=126
n=126/2
n=63
| 9x^2+28x-37=0 | | -3(x-8)+4x=-12 | | 2a+3a+7=12 | | x+-13.4=1.7 | | 1.5(d+12)=1/2(2d-6) | | (a+2)3=a-10 | | -20+-5y+3y=24 | | 4b+4b+5b+5b=360 | | 8=1.8x | | 4x-5=7x-15 | | (2x/4)-6=2.5 | | (x-5)/3=(2x+5) | | (x-5)/3=(2x=5) | | a+15a=336 | | 11x+1=4x+3 | | 4x+3/5=12 | | 6x^2-150x+625=0 | | 200m-100m+53,075=55,000-175m | | 200m-100m+58,500=61,200-200m | | 5y2-7y+1=0 | | 0=-2x^2+98x-720 | | 0=-2x^2+98x+720 | | 0=-2x^2+96x+720 | | 5s+5=8+2 | | -5x+5=-10x+8 | | 2(4s-2)=8s-4 | | 14x+2=4x+7 | | 3(x+2)/5-2=4(x-1) | | 3(x+2)-2/5=4(x-1) | | 33b^2+11b+10=0 | | 5(x+3)/2=7 | | (7y+2)^2+112=0 |