Answer 18 & 19 for the brainliest answer

18a: Step 1.

18b: She should have distributed the 3 into the parentheses, making it (3x + 12).

19a: Step 1

19b: She should have distributed the 7 to the -5 inside the parentheses, making it -35.

Step-by-step explanation:

In 18, the equation is x + 6 + 3(x + 4). The 3 is directly outside of the parentheses, and in math this you need to multiply them together. Think of it as 3 ⋅ ( x + 4 ). Yessenia forgot to do this and instead added the 3 and the 6 together. This is what makes step 1 incorrect.

To fix this, you would simply have to distribute the 3 properly and then combine like terms as needed.

In 19, the equation is x + 3 + 7(x - 5). In step 1 Sierra forgot to distribute to every value inside the parentheses, missing the -5.

To fix this, you would simply multiply 7 with -5 in order to complete the distribution, and then combine like terms as needed to get the final equation.

the answer is a

step-by-step explanation: