Working with Variables.

MATHEMATICS · Multi-part · CBSE · Mathematics · We Distribute, Yet Things Multiply · We Distribute, Yet Things Multiply

Problem

Working with Variables. (1) Expand the product

9(3x + 7)

. (2) Simplify

7a - 5b + 3(6a + b)

. (3) Simplify

a - (-7a - 3)

. (4) Simplify

3(5 - 2r) - 2(-3r + 1)