algebra questiins please answer and show how to solve

solve each system by substitution 1. X+y=-1 -6x-8 y=18 2. -2x+y=4 -6 x+7y= -4 3. Y=3 3x+5y=12 4. 3x-8y=0 X-8y=0 5. 4x-5y=2 2x+y=8
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?????????????? yu ever heer av the idea av put separater tween stuf that look all the same ??????????...how bout add komma or semikomms...... line 1: x+y=-1, or y=-x -1... line 2: -6x -8y=18, or 3x+4y=-9 ... line2...3x +4(-x-1)=-9... 2x -4x -4=-9... -2x=-9 +4=-5... x=5/2=2.5... y=-x-1=-2.5 -1 y=-3.5
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