Answer:
[tex]x=6[/tex]
Step-by-step explanation:
AC = AB + BC
[tex]18x-7=(7x+29)+30[/tex]
[tex]18x-7=7x+29+30[/tex]
[tex]18x-7=7x+59[/tex]
Add 7 to both sides:
[tex]18x-7+7=7x+59+7[/tex]
[tex]18x=7x+66[/tex]
Subtract 7x from both sides:
[tex]11x=66[/tex]
Divide both sides by 11:
[tex]\frac{11x}{11}=\frac{66}{11}[/tex]
[tex]x=6[/tex]
