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Question
Simplify: `"x" - ("3y" - bar"4x - 3x" + 2z - bar"5y - 7x")`
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Solution
`"x" - ("3y" - bar"4x - 3x" + 2z - bar"5y - 7x")`
= x – (3y – 4z + 3x + 2z -5y + 7x)
= x - (- 2y - 2z + 10x)
= x + 2y + 2z - 10x
= - 9x + 2y + 2z
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