Respuesta :
Answer: its 13
Step-by-step explanation: how do you not know this
20-7=13
If you need an explanation
10+10 is 20 so if you say one of those tens and -7 then it’s 3 so now it’s
10+3 which is equal to 13
If you need an explanation
10+10 is 20 so if you say one of those tens and -7 then it’s 3 so now it’s
10+3 which is equal to 13