How old was Abraham when his father died?

In Genesis 11:26 we read, “Terah lived seventy years and begat Abram, Nahor, and Haran,” and in V. 32, “and the days of Terab were two hundred and five years and Terah died in Haran.” Now, taking 70 from 205, would make Abram 135 years when Terah died, while we know from Gen. 12:4 that Abram was 75 years old when he left Haran, and from Acts 7:4 that he did not leave Haran till Terah died.

It is not necessary to believe from Genesis 11:26 that Abram, Nahor, and Haran were all born in the same year, but simply that Terah had no children till he was 70, and then had three sons born at intervals. In Genesis 5:32, we have an instance of the same thing, when we read that “Noah was five hundred years old, and Noah begat Shem, Ham, and Japheth,” and yet Genesis 10:21 tells us Japheth was older than Shem. It is equally clear that Abram was not the eldest of the three brothers. He and Shem are put first because of their importance as the progenitors of the chosen race and the Messiah. It is generally held that Haran was the eldest, born when Terah was 70, and that Abram came into the world 6o years later. This would account for the fact that he and his nephew Lot, son of Haran, seem to have been much of the same standing. Besides, we are distinctly told that Abraham was 75 when at the death of Terah, he departed out of Haran. He was born, therefore, when his father was 130 years of age.