solving equations by combining like terms

Front

7n-5n=6

Back

n=3

Front

r+4r-1=24

Back

r=5

Front

7a+1+3=18

Back

a=2

Front

v+8-6=10

Back

v=8

Front

7n-2-4n=4

Back

n=2

Front

66=4+8x-2

Back

x=8

Front

47=1+6v+4

Back

v=7

Front

10=2x+8x

Back

x=1

Front

3x+2x+7-2=15

Back

x=2

Front

8n+4n= -24

Back

n= -2