All four of these questions use the fact that CA + AT = CT.
Question 1
[tex]3x+8=7x-16\\\\8=4x-16\\\\4x=24\\\\x=6[/tex]
Question 2
[tex]x+10+2x+1=6x+2\\\\3x+11=6x+2\\\\11=3x+2\\\\3x=9\\\\x=3[/tex]
Question 3
[tex]14+9x=11x-6\\\\14=2x-6\\\\20=2x\\\\x=10[/tex]
Question 4
[tex]3x-4+21=8x+2\\\\3x+17=8x+2\\\\17=5x+2\\\\5x=15\\ \\ x=3[/tex]
