The line ax+(a+1)y=a+2 passes through the point (4,-8). Find a.
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plug (4,-8) in the equation
a*4+(a+1)*(-8)=a+2
4a-8a-8=a+2
4a-8a-a =2+8
-5a=10
a=10/-5
a=-2
a*4+(a+1)*(-8)=a+2
4a-8a-8=a+2
4a-8a-a =2+8
-5a=10
a=10/-5
a=-2
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