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padilas [110]
3 years ago
10

Simplify 7x + [x - (5 + x)]. 9x - 5 7x - 5 8x - 5

Mathematics
2 answers:
eimsori [14]3 years ago
8 0

Answer:

9x - 5

Step-by-step explanation:

7x + x + x = 9x

which leaves 9x - 5

pychu [463]3 years ago
8 0

Answer: ok si cela aide alors ...

Step-by-step explanation:

While removing the brackets:

1) If there is + in front of them, you simply erase them

a + (b + c) = a + b + c

2) If there is - in front of them, every number that was in brackets changes it's sign

a - (b + c) = a - b - c

By applying the upper rules we do it this way:

7x + [x - (5 + x)] =

7x + ( x - 5 - x) =

7x + x - 5 - x =

7x - 5

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