8x−2=−9+7x
Simplify:
8x−2=−9+7x
8x+−2=−9+7x
8x−2=7x−9
Subtract 7x from both sides.
8x−2−7x=7x−9−7x
x−2=−9
Add 2 to both sides.
x−2+2=−9+2
x=−7
Answer: w = 7, x = 6
Step-by-step explanation: Solve by substitution
W + b = 13
rewrite as b = 13 - w and substitute that value for b in the second equation
6.5w + 2b = 57.5 Then solve for w
6.5w + 2(13-w) = 57.5 . Distribute
6.5w + 26 - 2w = 57.5 . Subtract 26 from both sides. Combine like terms and simplify
6.5w - 2w = 57.5 - 26
4.5w = 31.5 Divide both sides by 4.65
w = 7 . Substitute 7 for w in the first equation and solve for b
7 + b = 13 . Subtract 7 from both sides
b = 6
Answer:
Step-by-step explanation:
the median for 35 values, you can cross the first one and last one until there is only one value left, with should be the 18ᵗʰ value
the median for 36 values, same thing, but after cross all, there will be 2 values left instead of 1, just find the mean between 2 values.
