Help me fast pls! given the equation 5+x-12=x-7

Part A: solve equation 5+x-12=x-7. In your final answer, be sure to state the solution and include all of your work.

Part B. Use the values x = -4, 0, 5 to verify your solution to the equation 5+x-12=x-7. In your final answer, include all of your calculations

An assembly consists of two mechanical components. suppose that the probabilities that the first and second components meet specifications are 0.87 and 0.84. assume that the components are independent. determine the probability mass function of the number of components in the assembly that meet specifications. x

What situation is an example of an observational study

Based on the graph, what is the initial value of the linear relationship? a coordinate plane is shown. a line passes through the y-axis at -2 and the x-axis at 3.