Yesterday morning at 8 a.m. the temperature was -14°F. At noon it was 10 degrees warmer. The temperature increase between noon and and 4 p.m. was twice the temperature increase between 8 a.m. and noon. What was the temperature at 4 p.m
At noon, the temperature was -14°F + 10°F = -4°F.
The temperature increase between noon and 4 p.m. was 10°F x 2 = 20°F.
Therefore, the temperature at 4 p.m. was -4°F + 20°F = 16°F.