Answer:(6,-4)
Step-by-step explanation:
6x+7y=4x+4y
If (?,-4)
So we are solving for x. Substitute the y with -4.abd solve.
6x+7(-4)=4x+4(-4)
Multiply 7(-4) on left side and 4(-4) on right side.
6x-28=4x-16
Subtract 4x both sides to get x term on left side
6x-4x-28= -16
Now add 28 to both sides to move to the right side because you want to keep x on left side.
6x-4x=28-16
2x= 28-16
Subtract 28 from 16
2x= 12
Divide 2 to both sides
X=12/2
Solve 12÷2=6
X=6
Answer:
[tex]S=\left \{ \left ( 6,-4 \right ) \right \}[/tex]
Step-by-step explanation:
1) In this equation we have one solution already given for y. y=-4. Let's make it one simplest equation:
[tex]6x+7y=4x+4y\\6x-4x=-7y+4y\Rightarrow 2x=-3y[/tex]
Now, plugging in the y value already given:
2)[tex]2x=-3(-4)\Rightarrow 2x=12\Rightarrow x=6[/tex]
[tex]S=\left \{ \left ( 6,-4 \right ) \right \}[/tex]
