Answer:
Step-by-step explanation:
Given:
Isolate b:
Find b:
[tex]\\ \sf\longmapsto t+\dfrac{1}{2}b=Y[/tex]
[tex]\\ \sf\longmapsto \dfrac{1}{2}b=Y-t[/tex]
[tex]\\ \sf\longmapsto \dfrac{b}{2}=Y-t[/tex]
[tex]\\ \sf\longmapsto b=2(Y-t)[/tex]
[tex]\\ \sf\longmapsto b=2Y-2t[/tex]