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Anonymous
As we divide a positive by negative sign then the result also has negative sign.
When we add we get 3x + 10. Then dividing by - 5, then it becomes - 3x/5 - 2.
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(2, -1)
x=10
-2
3+3x+7x=13 3x+7x=10 10x=10 x=1
x = 2