The symbol that would make it true would be >
You use PEMDAS. Start by distributing the terms in the parentheses. The isolate the variables. To do that you subtract x from one side of the equation to the other side. You always do the other operation. If it is adding you subtract, if your multiplying your dividing and the other way around. Then you subtract 10 from each side. This equation has many solution because all the terms cancel out.
let's common be "x" 8x add 5x equal to 13 x now x equal to 26 devise 13 equal to 2,. so ans is 2
Really it depends on what your trying to match it too
But it can be equal to
~10.5669 U.S liquid gallons
~40,000 milliliters
~169.07 cups
~84.5351 pints