Find the value of x rt=4x+10 sw= 5x-20

Well, as you can see from the rectangle RT and SW should have equal lengths. So to find the value of x, we need to do

4x + 10 = 5x - 20
-x + 10 = -20              (Subtraction property of equality)
-x = -30                      (Subtraction property of equality)
x = 30                        (Division property of equality)

To check our work:

4(30)+10 = 130
5(30)-20 = 130

So, the value of x is 30!

Ithink it should be 55.