SubArea: Arithmetic sequencesLevel: BProject ID: 9000072702Source Problem: 9000072703Accepted: 1Clonable: 1Easy: 1The following numbers form an arithmetic sequence. Find \(x\). \[ 10\, ,\ 20\, ,\ x \]\(x = 30\)\(x = 40\)\(x = -20\)\(x = -10\)
