Question

4a+3b=1. B=2a-23

Answer 1

Interpreting B as b, substitute b = 2a − 23 into 4a + 3b = 1:

4a + 3(2a − 23) = 1
4a + 6a − 69 = 1
10a − 69 = 1
10a = 70
a = 7

Then b = 2(7) − 23 = 14 − 23 = −9.

Solution: a = 7, b = −9 (check: 4·7 + 3·(−9) = 28 − 27 = 1).