Answer:
-20 1/12
Step-by-step explanation:
x=7
y=2
10 + 2x = -2y ➡y = -5-x
replace y with -5-x in the first equation
-5-x-x = 9➡ -2x-5 = 9 ➡-2x = 9+5 ➡ x = -7
now use this information to find value of y
y - (-7)=9 ➡y = 2
x=2
2-2=0
square root of 0 is 0
0+2=2
and 2=2 so its 2
2x+12 simplified is x+4
21
