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Camille Singleton
Mathematics
18 October, 09:54
I need to solve for 3x+7=-x-1
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Francis Pollard
18 October, 10:23
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3x+7=-x-1
move - x to the other side
sign changes from - x to + x
3x+x+7=-x+x-1
3x+x+7=-1
4x+7=-1
move 7 to the other side
sign changes from + 7 to - 7
4x+7-7=-1-7
4x=-8
Divide by 4 for both sides
4x/4=-8/4
Answer: x=-2
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