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2x-3y=-6
-3x+4y=7
2x=-6+3y/:2
-3x+4y=7
x= -3+1,5y
-3(-3+1,5y)+4y=7
x= -3+1,5y
9-4,5y+4y=7
x=-3+1,5y
-0,5y=-2/:(-0,5)
x=-3+1,5y
y=4
x=-3+1,5*4
y=4
x=3
-3x+4y=7
2x=-6+3y/:2
-3x+4y=7
x= -3+1,5y
-3(-3+1,5y)+4y=7
x= -3+1,5y
9-4,5y+4y=7
x=-3+1,5y
-0,5y=-2/:(-0,5)
x=-3+1,5y
y=4
x=3