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Question
Simplify:
25y − (5x − 10y + 6x − 3y)
Sum
Solution
25y − (5x − 10y + 6x − 3y)
= 25y − 5x + 10y − 6x + 3y
= 25y + 10y + 3y − 5x − 6x
= 38y − 11x
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Concept of Substitution
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