To solve the equation, we begin by combining the like terms on the left side:
[tex]\[ 6b + (-5b) = 40 \][/tex]
Simplify the expression:
[tex]\[ (6 - 5)b = 40 \][/tex]
This reduces to:
[tex]\[ b = 40 \][/tex]
Therefore, the value of [tex]\( b \)[/tex] is:
[tex]\[ b = 40 \][/tex]