<span>400 - 2*Age = 244 << -2 * Age = -156 So our age = 78 years, months, days, hours since there were no actual units supplied. </span><span>400 - 2x = 244 -2x = 244 - 400 -2x = -156 x = -156/-2 A better example above as above was just a simplified version.</span>
