Hi Brainiac
3x+2y=7
y=-3x+11
We need to solve y=-3x+11 for y
Now let's start by substitute -3x+11 for y in 3x+2y=7
3x+2y=7
3x+2(-3x+11)=7
-3x+22=7
Now add -22 to both sides
-3x+22-22=7-22
-3x=-15
To find the value for x we need to divide both sides by -3
-3x/-3= -15/-3
x=5
Now we have the value for x :)
Let's find the value for y by substitute 5 for x in y=-3x+11
y=-3x+11
y=-3(5)+11
y=-4
Here you go :)
The answer is D
Good luck :0
