Answer:
x=24
Step-by-step explanation:
Hello There!
Angle E and angle D are supplementary angles meaning that the sum of the two angles equals 180
So we setup an equation
180=2x+12+5x
step 1 combine like terms
5x+2x=7x
now we have
180=7x+12
step 2 subtract 12 from each side
12-12 cancels out
180-12=168
now we have
168=7x
step 3 divide each side by 7
7x/7=x
168/7=24
we're left with~ x=24
~TheMathWiz
