Help me simplify 7x-(x-y) and 9a-(2b-a)

Mathematics

2 answers:

jonny [76]3 years ago

8 0

7x-(x-y) = 7x - x + y = 6x + y

9a-(2b-a) = 9a+a-2b = 10a-2b

hope it helped

frozen [14]3 years ago

6 0

Since there's a - next to the bracket, you minus everything inside of it, if there's a minus in the bracket, it turns to +
7x-(x-y) = 7x-x+y = 6x+y
9a-(2b-a) = 9a-2b+a = 10a-2b

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