Answer:
x = -2
Step-by-step explanation:
5x + 7 = 2x + 1
subtract both sides by 2x
3x + 7 = 1
subtract both side by 7
3x = -6
divide both sides by 3
x = -2
Step-by-step explanation:
We have got the lines :

Both lines intercept the x-axis in the point :

In all point from x-axis the y-component is equal to 0.

We replace the I point in the lines equations:

From the first equation :

From the second equation :

Then 
Finally :

y = ax + b and y = cx + d have the same x-intercept ⇔ad=bc
Answer:
Uh, this isnt solvable, you sure u got the right problem???
Step-by-step explanation:
7 sqrt(16*2) - 6 sqrt( 36*2)
7*4sqrt(2) - 6*6sqrt(2)
28sqrt(2) - 36 sqrt(2)
-8sqrt(2)