Answer:
I know the top one is correct so the bottom has to be as well. :)
Answer:
for the first photo the answer is 5x + 6(-x + 4) = 13
Step-by-step explanation:
if y equals to -x +4
then replace the y in this equation: 5x + 6y = 13 with this ( -x +4 ) its simple.
I cannot answer the other 2 photos at the moment but ill see if I can whenever else I have time.
First, you just need to disregard the greater than sign because these types of equation is solved the same way as those with equals (=) sign in the middle. So when y=6,
First you need to substitute y=6 to the y in 3y
3(6)>2x
By multiplying,
18>2x
By dividing both sides of the equation by 2
18/2 > 2x/2
9>x
However if you want to transpose x to the left side of the equation, you also need to reverse the sign to <
Which means
X<9
Answer:
y = 
Step-by-step explanation:
Given
2x + 5y = 12
Isolate the term in y by subtracting 2x from both sides
5y = 12 - 2x ( divide both sides by 5 )
y =
Two different things u can do
Substitution:
X-9y=12
+9y +9y
X=9y+12
-3(9y+12)+9y=36
-27y-36+9y=36
+36 +36
-18y = 72
/-18 /-18
Y = -4
Or whatever this other I’ve is called
-3x-9y=36
-1(X-9y)=(12)-1
-3x-9y=36
-x+9y=-12
-4x=24
X= -6
