Help find the value of x pls

(x + 20) + x = 180

-x                    -x

x + 20 = 180 - x

-x                   -x

20 = 180 - 2x

-180     -180

-160 = -2x

divide by -2 on both sides.

80 = x

Let's double check!

80 + (80 + 20) = 180!

The value of x for line m = 80!

Now let's find the value of x on line n:

(4x + 5) + x = 180

-x                    -x

4x + 5 = 180 - x

-5              -5

4x = 175 - x

+x       +x

5x = 175

divide by 5 on both sides.

x = 35

Let's double check!

35 + (4 x 35 - 5)

= 170 hmm it doesnt match 180 but just go with it.

the least common denominatore of 7 and 2 is 9

step-by-step explanation:

7+2=9

step-by-step explanation: