Mark recorded two temperature measurements for experiment one was 2/3 of another measurement. if the sum of the measurements - 30degrees c, what two measurements were recorded?

X + y = - 30

x = 2/3y

2/3y + y = - 30

2/3y + 3/3y = - 30

5/3y = - 30

y = - 30 * 3/5

y = - 90/5 = - 18

x = 2/3y

x = 2/3 (-18)

x = - 36/3 = - 12

the 2 measurements recorded were : - 18 and - 12