This type of exercise typically involves algebraic expressions where one must first distribute a factor across terms within parentheses and then simplify the resulting expression by grouping similar terms. For example, simplifying 3(2x + 5) + 4x requires distributing the 3 to both 2x and 5, yielding 6x + 15 + 4x. Then, combining the like terms 6x and 4x gives the simplified expression 10x + 15.
Mastering this combined skill is fundamental to algebra and its numerous applications across mathematics and related fields. It allows for the simplification of complex expressions, making them easier to solve and analyze. This simplification process underpins problem-solving in areas ranging from basic equation manipulation to advanced calculus and physics. Historically, the development of algebraic notation and techniques for manipulating expressions, including these core concepts, marked a significant advancement in mathematical thought, enabling more abstract and powerful reasoning.