Answer:
Step-by-step explanation:
1) n+15=10
solution;
n+15= -10
when a positive sign(+) is crossing an equality sign it becomes a negative sign(-)
so, n= -10 -15
n= -25
2) n-13= -12
solution;
remember the rule i told you in number 1 that's the same rule we will use here
n= -12+ 13
n=1
you see so easy... lets continue
3) n\5= -1\5
now in this one there is a new rule which is; when you see two fractions and there is an equal two in between them you cross multiply... okay lets solve
n\5= -1\5
-1*5=n*5
the reason why i exchanged was because the unknown should always be at the left hand side....okay
n*5=-1*5
5n/5= -5/5
5 will divide 5 which is remaining n
5 divide 5 which is -1
so n = -1
4) -5n =1
this is not a fraction so we just take the -5 to 1 and no cross multiplication (they are whole numbers so they meet each other)okay...
so, n=1/-5
