Answer:
a. (7x)+(x-12)=180
b.
m<1=168
m<2=
Explanation:
We know that angle 1 and angle 2 add up to 180 degrees. We also know their measures, so we can plug them in.
m<1+m<2=180
(7x)+(x-12)=180
8x-12=180
8x=192
x=24
Now let's plug it in to solve for the measures.
m<1=7x
m<1=7(24)
m<1=168
m<2=x-12
m<2=24-12
m<2=12
We know this is correct because 12+168=180.