Lesson 4.1 Evaluate algebraic expressions for given values if the variables.

Answer:
1. 4
2. 84
Step-by-step explanation:
1. 9+3a-5x
=9+3(5)-5(4)
=9+15-20
=24-20
=4
2.2(6d+3)-3b
=2(6(7)+3)-3(2)
=2(42+3)-6
=2(45)-6
=90-6
=84