Substitute into (B): \( 5a + (2.5 - a) = 1.5 \Rightarrow 4a + 2.5 = 1.5 \Rightarrow 4a = -1 \Rightarrow a = -\frac14 \) - AMAZONAWS 📅 March 6, 2026 👤 scraface Mar 06, 2026