Answer:
C) x = -2
Step-by-step explanation:
Original equation:
subtract 12 from both sides:
square both sides:
subtract 1 from both sides:
divide both sides by -4:
3(-2x + 6) - x + 3 = 0
-6x + 18 - x + 3 = 0
-7x + 18 + 3 = 0
-7x +21 = 0
-7x = -21
-7x/-7 = -21/-7
x = 3
y = -2(3) + 6
y = -6 + 6
y = 0
x= 3 y = 0
Simplify any of the equations:
m=3+n for example
then put the simplified equation into the other equation that is not simplified:
(3+n)+n=5
simplify:
3+2n=5
2n=2
n=1
plug into the first simplified equation for m:
m=3+n
m=3+1
m=4
answer:(1,4)
Rearranging y = 8x -4y = 12 in the y = mx + b form gives y = 2x - 3
y = 2x - 3
y = mx - 6 (already in y = mx + b form)
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Parallel lines have the same slope.
m = 2
Note that the two lines have the different y-intercepts and are not the same line.