6-7n=29 would be your answer
So it started at 180. After 4 more years it’s grown 188 cm to 368. If we estimate that it’ll grow 188 cm in another 4 years that puts our total to around 556. If we estimate and take off a year, it would probably be around 548 cm :)
which class is this because I am in 7th class so that's why I can't give
there isn't a rule that u dont have anything so pull out a ruler and measure it