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I'm almost in tears, I've been trying to solve this equation yesterday and today with no success. Please help!
My attempt at solving (I'm going to put numbers by every line so you can help me find my mistakes easier):
But the answer should be 10. Please please help! I'm begging you.
Start with what you have in line 3.
On the right hand side of the equation you have a positive 8, and x, and a negative 8 that are all not under square roots. Move them to the left side of the equation. You will be left with 8 on the left side of the equation. Now square both sides and the square roots will cancel out on the right side. Solve for x.