Respuesta :
Answer:
20 + -9 + 8 + -7
Step-by-step explanation:
A epression DOES NOT have a equal sign, =
20-9+8-7 = 12
20 + -9 + 8 + -7
to check -->
20 +-9 + 8 + -7
20 + -9 = 20 - 9 = 11
11 + 8 = 19
19 + -7 = 19 - 7 = 12
So therefor it would be
20 + -9 + 8 + -7