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dexar [7]
3 years ago
11

Expressions equivalent to 6x+4

Mathematics
1 answer:
stiv31 [10]3 years ago
6 0
2(3x+2) I couldn’t find any other ones, your best bet would be to go into decimals or fractions if you want to find more.
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A certain number of sixes and nines is added to give a sum of 126; if the number of sixes and nines is interchanged, the new sum
galina1969 [7]

Answer:

Original number of sixes = 6

Original number of nines = 10

Step-by-step explanation:

We are told in the question that:

A certain number of sixes and nines is added to give a sum of 126

Let us represent originally

the number of sixes = a

the number of nines = b

Hence:

6 × a + 9 × b = 126

6a + 9b = 126.....Equation 1

If the number of sixes and nines is interchanged, the new sum is 114.

For this second part, because it is interchanged,

Let us represent

the number of sixes = b

the number of nines = a

6 × b + 9 × a = 114

6b + 9a = 114.......Equation 2

9a + 6b = 114 .......Equation 2

6a + 9b = 126.....Equation 1

9a + 6b = 114 .......Equation 2

We solve using Elimination method

Multiply Equation 1 by the coefficient of a in Equation 2

Multiply Equation 2 by the coefficient of a in Equation 1

6a + 9b = 126.....Equation 1 × 9

9a + 6b = 114 .......Equation 2 × 6

54a + 81b = 1134 ........ Equation 3

54a + 36b = 684.........Equation 4

Subtract Equation 4 from Equation 3

= 45b = 450

divide both sides by b

45b/45 = 450/45

b = 10

Therefore, since the original the number of nines = b,

Original number of nines = 10

Also, to find the original number of sixes = a

We substitute 10 for b in Equation 1

6a + 9b = 126.....Equation 1

6a + 9 × 10 = 126

6a + 90 = 126

6a = 126 - 90

6a = 36

a = 36/6

a = 6

Therefore, the original number of sixes is 6

7 0
3 years ago
Write the equation. 5 more than a number times 2 is 2
suter [353]

(5 +n)\cdot2 = 2

3(2 -n) > 7

8 0
3 years ago
Write as a unit rate<br>12 inches of rain in 6 hours​
RideAnS [48]
Answer is 2 inches per hour.

12 inches/6 hours divided by 6 is 2 inches/ 1 hour.
5 0
2 years ago
Answer with explaination every steps​
g100num [7]

Answer:

y = - 35

Step-by-step explanation:

Expressing as a fraction , that is

\frac{y}{-7} = 5 ( multiply both sides by - 7 to clear the fraction )

y = - 35

5 0
3 years ago
-8,-14,-20 whats the next term
Nookie1986 [14]
26 is the answer
because its counting by 6
8 0
3 years ago
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