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Anika [276]
3 years ago
10

3. Five less than twice a number is 7.

Mathematics
2 answers:
Ainat [17]3 years ago
8 0

Answer: 2a -5 = 7    and a = 6

Step-by-step explanation:

If 5 is less than twice a, the the expression will be  2a -5, since 2 a is the same as 2 times a, and 5 less than 2a is the same as subtracting 5 from 2a. "is" is the same as equal to, so the whole expression has to equal 7.

2a - 5 = 7   You can solve for a by adding 5 to both sides.

   +5    +5

2a = 12         Now divide both sides by 2.

a =  6.

Vera_Pavlovna [14]3 years ago
7 0

Answer:

2x-5=7 As an expression

x=6

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The sum of the digits of a two digit number is 9 When the digits are reversed the number increases by 9. Find the number.
Jet001 [13]

Answer:45

Step-by-step explanation:

Let the unit place be ‘x'

Tenth place be y

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6 0
3 years ago
What is 204,902 is scientific notation? also 124,510 in scientific notation.
Nesterboy [21]
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124 510.0

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124 510 = 1.2451  × 10⁵
3 0
3 years ago
Read 2 more answers
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