Problem: 8x-6-8=4+2x
First Step: Combine like terms. First, do -6-8 which is -14. This will leave you with 8x-14=4+2x.
Second Step: Collect Like terms again. This will leave you with 8x-2x=4+14. One you add and subtract those, you will be left with 6x=18.
Third Step: Divide by 6 on both sides.
Fourth Step: You got your answer x=3
4.54 billion years<span>The "best" age for the Earth is based on the time required for the lead isotopes in four very old lead ores (galena) to have evolved from the composition of lead at the time the Solar System formed, as recorded in the Canyon Diablo iron meteorite. This "model lead age" is <span>4.54 billion years</span></span>