SOLUTION: Solve the system by addition or substitution.
–6x + 3y = 12
y = 2x + 3
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Question 82405: Solve the system by addition or substitution.
–6x + 3y = 12
y = 2x + 3
Answer by checkley75(3666) (Show Source): You can put this solution on YOUR website!
y=2x+3 now substitute (2x+3) for y in the other equation & solve for x.
-6x+3(2x+3)=12
-6x+6x+9=12
0x=12-9
0=3 now common solution here.
proof we plot the 2 lines
y=2x+3 (red line) &
3y=6x+12, y=6x/3+12/3, y=2x+4 (green line)
(graph 300x200 pixels, x from -6 to 5, y from -10 to 10, of TWO functions y = 2x +3 and y = 2x +4).
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