4x+12=20
-12 -12
4x=8
4 4
X=2
Answer:
x = - 16
Step-by-step explanation:
The equation relating two proportional quantities is
y = kx ← k is the constant of proportionality
To find k use the condition when y = 1, x = - 4
k =
= - 
y = -
x ← equation of proportionality
when y = 4, then
4 = -
x (multiply both sides by - 4 )
x = - 16
The radius for this equation is 7
Answer:
x = 1/4
Step-by-step explanation:
To solve, we need to find the constant of proportionality (k) which is defined by the equation:
yx = k

Therefore when y= 16,

Answer:
n=-1
Step-by-step explanation:
-13+n+5+6=5+4n-4
n-2=4n+1
-2=3n+1
-3=3n
-1=n