Answer:
x is 13
Step-by-step explanation:
x-2=11
then x = 11 +2
since the negative 2 will be crossing over the equal sign to turn positive
x= 13
Answer:
x = 10
Step-by-step explanation:
It says they equal each other so equal the two separate expressions together
-2x + 30 = 2x - 10
goal is to isolate variable x
add 2x to both sides (this cancels out the -2x on the left side)
30 = 4x - 10
add 10 to both sides (this cancels out the -10 on the right side)
40 = 4x
divide 4 by both sides (cancels out 4 on the right side)
10 = x
Right now, after 5 games, his average is
(1/5) (210 + 225 + 254 + 231 + 280) = (1/5) (1,200) = 240
In order to maintain this exact average through the sixth game,
he must roll a <u>240</u> .