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Mathematics
Yaretzi Sherman
16 October, 16:41
Simplify 7x + [x - (5 + x) ].
9x - 5
7x - 5
8x - 5
+3
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2
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Amiya Leblanc
16 October, 17:22
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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Isabelle Case
16 October, 17:30
0
9x - 5
Step-by-step explanation:
7x + x + x = 9x
which leaves 9x - 5
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