Question

if the mean of X, x +2,x+4,x +6,x +8 is 24, find x

Answer 1

$x + 2 + x + 4 + x + 6 + x + 8 \div 4 = 24 \\ 4x + 20 \div 4 = 24 \\4x + 20 = 24 \times 4 \\ 4x + 20 = 96 \\ 4x = 96 - 20 \\ 4x = 76 \\ x = 76 \div 4 \\ x = 19$