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Igoryamba
2 years ago
14

Solve x + 9 = 18 - 2x

Mathematics
1 answer:
bezimeni [28]2 years ago
6 0
Add 2x to both sides,
3x+9=18
Subtract 9 from both sides. 3x=9
Divide both sides by 3. 
x=3
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A square mosaic is made of small glass squares. If there are 256 small squares in the mosaic how many are along an edge?
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To do this, you got to square 256.

The square root of 256 is 16.

Therefore, there are 16 small squares on each edge of the mosaic.

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o   o   o   o   o   o   o   o   o   o   o   o   o   o   o   O
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o   o   o   o   o   o   o   o   o   o   o   o   o   o   o   O
o   o   o   o   o   o   o   o   o   o   o   o   o   o   o   O
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o   o   o   o   o   o   o   o   o   o   o   o   o   o   o   O
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o   o   o   o   o   o   o   o   o   o   o   o   o   o   o   O

There are 256 squares, and you can count 16 on each edge. this shows 16 times 16, or 16 squared, which is 256.

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