Question

Given that
R
=
8
x
+
4
y

Find
y
when
x
=
8
and
R
=
30

Give your answer as an improper fraction in its simplest form.
y
=

answerrrrrrr

Answer 1

Answer:

8 1/2

Step-by-step explanation:

R= 8x+4y

30= 8(8)+4y                                               Replacing the units

30= 64+4y

4y= 30-64

4y= -34

y= -34/4

y=8 1/2

Answer 2

Answer:

Y = -17/2

Step-by-step explanation:

R= 8x + 4y ------eq 1

x=8 R=30

substituting in eq 1

30 = (8) (8) + 4y

30 = 64 + 4y

30 - 64 = 4y

4y = - 34

y = -34/4

y = -17/2