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Math Problems
Grade 8
Which x satisfies an equation?
{
y
=
−
4
x
+
3
2
x
+
8
y
=
10
\left\{\begin{array}{l}y=-4 x+3 \\ 2 x+8 y=10\end{array}\right.
{
y
=
−
4
x
+
3
2
x
+
8
y
=
10
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What value of
x
x
x
is a solution to this equation?
\newline
3
x
=
9
3x = 9
3
x
=
9
\newline
Choices:
\newline
(A)
x
=
3
x = 3
x
=
3
\newline
(B)
x
=
4
x = 4
x
=
4
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What value of
b
b
b
is a solution to this equation?
\newline
4
b
=
8
4b = 8
4
b
=
8
\newline
Choices:
\newline
(A)
b
=
1
b = 1
b
=
1
\newline
(B)
b
=
2
b = 2
b
=
2
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4
(
80
+
n
)
=
(
3
k
)
n
4(80+n)=(3k)n
4
(
80
+
n
)
=
(
3
k
)
n
\newline
In the given equation,
\newline
k
k
k
is a constant. For what value of
\newline
k
k
k
are there no solutions to the equation?
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