Answer:
-15-7h
Step-by-step explanation:
-4+3= -1+-10=-11 -11-4=-15 -15-7h
you can't add a number with a variable
-15 + -7h
-4 + 3 + -10 - 4 - 7h
-1 + -10 - 4 - 7h
-11 - 4 - 7h
