Solve the equation -4 + (-1) + 2 + ... + x = 432.
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-4+(-1)+2+y+x=432
-4-1+2+y+x=432
-5+2+y+x=432
-3+y+x=432
y+x=432+3
y=435-x
Therefore,
y+x=435
x-435+x=435
2x-435=435
2x=435+435
2x=870
x=870/2
x=435
y=435-x
y=435-435
y=0
-4-1+2+y+x=432
-5+2+y+x=432
-3+y+x=432
y+x=432+3
y=435-x
Therefore,
y+x=435
x-435+x=435
2x-435=435
2x=435+435
2x=870
x=870/2
x=435
y=435-x
y=435-435
y=0
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