If it's not what You are looking for type in the equation solver your own equation and let us solve it.
261=213-x
We move all terms to the left:
261-(213-x)=0
We add all the numbers together, and all the variables
-(-1x+213)+261=0
We get rid of parentheses
1x-213+261=0
We add all the numbers together, and all the variables
x+48=0
We move all terms containing x to the left, all other terms to the right
x=-48
| p=2L+2W;L=95;W=142 | | 8(v-9)=8 | | 81=(4y-1) | | 12=(25-x)-(12-2x) | | 1.5(x-4)=1.8-2.5x | | 2d372090=1 | | 6xx=72 | | 8x+5=2x+31 | | 6x-x=72 | | 16x=47 | | 3(2z-5)=(z+4) | | -2x+2=10x-58 | | 2x-2=-10x+58 | | -2x+2=-10x+58 | | 3(2z-5)=5(z=4) | | 3(4w-5)=2(6w=6) | | 4•(2x+3)=3•2x+2 | | 4×(2x+3)=3×(2x+2) | | -x=-0.16 | | a-1/4=a/5 | | 2.5=1.08x+2 | | 2w+3=12 | | 400x-0.29=600+0.45 | | (x+4)^4=3125 | | 4-10v+20=v+2 | | 4/5y=-1/9 | | 6=12/y | | f(4)=51=8 | | z-6.66=0 | | -26=m-5 | | 2•9^x=162 | | 18-4g-20=12-2g |