Find the value of x in the figure.

x = 100

Step-by-step explanation:

The two angles are supplementary so they add up to 180 degrees

180 -57 = 123

x + 23 = 123

subtract 23 from both sides

x = 100

hope this helps

2/3x + 7 = 29

step-by-step explanation:

two thirds = 2/3

plus a number = x

at least 29 = 29

there for you should get 2/3x + 7 = 29

the 8 in 8,420 is in the thousands place so it's value is 8 thousand.

the 8 in 6,870 is in the hundreds place so it's value is 8 hundred.

divide 8000 by 800 to find the answer:

8000 / 800 = 10

the 8 in 8,420 is 10 times greater than the 8 in 6,870