FIRST=
answer:
x= -2
Step-by-step explanation:
2x + 1 = -3
2x = -3 - 1
2x = -4
x = -2
SECOND=
answer: x = -5/9
Step-by-step explanation:
-3x+2=6x+7
-3x-6x+2=7
-9x=7- 2
x= -5/9
THIRD:
answer: n= 10/7
2n-4+4n=6-n
6n - 4 = 6 - n
6 n + n - 4 = 6
7n = 6 + 4
n= 10/7