Ayuda la 6 y 7 plisss !!!!
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6)
3A + B = 955
A + 3B = 1225
A = 1225 - 3B
3(1225 - 3B) + B = 955
3675 - 9B + B = 955
-9B + B = 955 - 3675
-8B = -2720
B = -2720/-8
B = 340
A = 1225 - 3(340)
A = 1225 - 1020
A = 205
el kilo de A es 205 y el kilo de B es 340
7)
X - 2Y = -1
2X + Y = 8
Y = 8 - 2X
X - 2(8-2X) = -1
X - 16 + 4X = -1
5X = -1 + 16
X = 15/5
X = 3
Y = 8 - 2(3)
Y = 8 - 6
Y = 2
LOS NÚMEROS SON 3 Y 2