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solmaris [256]
3 years ago
10

Help plzzz Thx thx thx

Mathematics
2 answers:
Step2247 [10]3 years ago
7 0
Under 10 the number is 21 because 21+9=30 and the other side is 9
Semenov [28]3 years ago
3 0
9m * 10m + 9m * 30 m

= 9m * ( 10m + 30m)

= 9m * 40m

= 9m * 4 * 10m

= 36m * 10m

= 360 m²

--------

Area:

360 metres²
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3 0
2 years ago
7-3b = 5b+15 solve the equation
densk [106]

7-3b = 5b+15

move 5b to the other side

sign changes from +5b to -5b

7-3b-5b=5b-5b+15 ( combine like terms)

7-3b-5b=15

7-8b=15

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to get +b and by itself

-8b/-8=8/-8

Answer:

b=-1

4 0
3 years ago
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