Answer:
[tex]\boxed{\boxed{b=\frac{d-c}{a}; a\neq 0}}[/tex]
Step-by-step explanation:
[tex]ab+c=d\\\\ab+c-c=d-c\\\\ab=d-c\\\\\frac{ab=d-c}{a}\\\\ \boxed{b=\frac{d-c}{a}; a\neq 0}[/tex]
