Equivalent expression to 3a+9b

1a (3+9b)

Step-by-step explanation:

Equivalent Expressions are the expressions which obtain the same value on substituting the values of variable. For Example: two algebraic expressions, 15y + 20 and 5 (3y + 4) are equivalent because both the expressions have same values for any value of y. Equivalent expressions are symbolized by an equality sign.

(3 x a) + (9 x b)