SOLUTION: How do you solve 7(1 − x) = 9(1 + 2x) + 8.
7-7x=9+18x+8
7-7x=17+18x
7-7-7x=17-7+18x
7x=10+18x
7x-18x=10+18x-18x
-11x=10
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Question 642667: How do you solve 7(1 − x) = 9(1 + 2x) + 8.
7-7x=9+18x+8
7-7x=17+18x
7-7-7x=17-7+18x
7x=10+18x
7x-18x=10+18x-18x
-11x=10
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
You made a mistake highlighted in red
7-7x=9+18x+8
7-7x=17+18x
7-7-7x=17-7+18x
7x=10+18x
7x-18x=10+18x-18x
-11x=10
It should be -7x and not 7x. So you lost a negative sign somehow.
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Start with the given equation.
Distribute.
Combine like terms on the right side.
Subtract from both sides.
Subtract from both sides.
Combine like terms on the left side.
Combine like terms on the right side.
Divide both sides by to isolate .
Reduce.
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Answer:
So the solution is
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