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Sagot :
x-6y= -54
add 6y to both sides to isolate x:
x=6y-54
substitute (6y-54) for x into the first equation:
13*(6y-54)-4y=38
78y-702-4y=38
74y-702=38
74y=740
y=10
x=6y-54=6(10)-54=6
(x, y) = (10, 6)
add 6y to both sides to isolate x:
x=6y-54
substitute (6y-54) for x into the first equation:
13*(6y-54)-4y=38
78y-702-4y=38
74y-702=38
74y=740
y=10
x=6y-54=6(10)-54=6
(x, y) = (10, 6)
13x - 4y = 38 = x - 6y = -54
12x - 4y = 38 = -6y = -54
12x = 38 = -2y = -54
12x = 92 = -2y
12x = 46
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