Step 2: Combine the like terms to get the simplified expression: 2a + 6b - 12c - 12.Step 1: Open the brackets: 6a + 2b - 3c - 4a + 4b - 9c -12 (Observe the changed signs of the second expression).Let's solve: (6a + 2b - 3c) - (4a - 4b + 9c + 12) using the horizontal method. It should be noted that if there’s a subtraction sign before the brackets, we need to reverse all the signs once we open the brackets. While subtracting one algebraic expression from another, we need to be careful with the signs. Let's add the same expressions using the column method. Then, we add the numerical coefficient of each column (like terms) and write the sum below it followed by the common variable. The column method requires the expressions to be written column-wise, one below the other, taking care that like terms are to be placed in the same column. Step 2: Combine the like terms to get the simplified expression: 3p + 6q + 9r + 6.
Step 1: Open the brackets: p + 2q + 3r + 4 + 2p + 4q + 6r + 2.To do this, we will first combine the like terms, write them together and add them to get the answer. Let us solve these expressions with the help of the horizontal method: (p + 2q + 3r + 4) + (2p + 4q + 6r + 2). There are two methods to add or subtract algebraic expressions.
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