Question

If AC=18x-7,find the x. Round to the nearest hundredth if necessary
AB=7x+29
BC=30​

Answer 1

`x=6`

Explanation:

AC = AB + BC

`18x-7=(7x+29)+30`

`18x-7=7x+29+30`

`18x-7=7x+59`

Add 7 to both sides:

`18x-7+7=7x+59+7`

`18x=7x+66`

Subtract 7x from both sides:

`11x=66`

Divide both sides by 11:

`(11x)/(11)=(66)/(11)`

`x=6`