Answer:
21 = 6 - <em>x</em> - 4<em>x</em>
simplify 6-x-4<em>x</em> to 6-5<em>x</em>
21 = 6-5<em>x</em>
subtract 6 from both sides
21-6 = -5<em>x</em>
simplify 21 - 6 to 15
15 = -5<em>x</em>
divide both sides by -5
= <em>x</em>
simplify 
to 3
-3 = <em>x</em>
switch sides
<em>x</em> = -3
Step-by-step explanation:
X = r - h/y ; Solve for h & r
Let's first solve for h :)
Add h/y to both sides.
h/y + x = r
So, r = h/y + x
Now, let's solve for h.
x = r-h/y
Subtract r from both sides.
-r + x = -h/y
Multiply both sides by y.
y(-r + x) = y(-h/y)
Simplify.
-ry + xy = -h
Divide both sides by -1.
ry - xy = h
So, h = ry - xy
~Hope I helped!~
9 and 10
11 and 12
13 and 14
15 and 16
the square root of 125 is 11.18 so therefore it falls between 11 and 12
The collection would have twelve nickels and nine quarters.
Answer:
m=84
r:m = 1:7
therefore when r= 1 then M=14
I think that's how you do it
