The sum of the inside angles of a triangle, always sum up to 180 degrees. Using this information, we can create the following equation for this problem:

Adding up all terms with 'x' and adding the other together, we have the following equation:

Solving this last equation for 'x', we have the following:

Then, the final answer for the 'x' value is twelve!
Answer:
b 233 7 in
Step-by-step explanation:
i think
Answer:
second and last one
Step-by-step explanation:
the less a negative the closer it is to zero which means it's closer to being a positive
Answer: -11x+15
Step-by-step explanation: distributed property: 2x+2-3x-7-10x+20, -11x+15