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Elina [12.6K]
4 years ago
14

True or false, in an equation, you can use a letter as a variable.

Mathematics
2 answers:
Monica [59]4 years ago
7 0
Obviously, it would be true. 
Example: 3x+4x=7x
x is the variable
lisabon 2012 [21]4 years ago
5 0
Yes, it is true, you can use a letter as a variable in an equation.
HOPE I HELPED!!!
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Answer:

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Step-by-step explanation:

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Jamar divided 256 by 4 and got the answer of 64. Which problem could he use to check his answer?
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Jack wants to simplify the expression below.
mamaluj [8]

Answer:

5.3x - 4 .

Step-by-step explanation:

(6.7x -3) - (3.4x - 1) + (2x - 2)

1. using the commutative property:

= 6.7x - 3 +  2x - 2 - (3.4x - 1)      (we can remove the parentheses around the first 2 groups because they are added).

2. Using the distributive property on the last group:

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6 0
4 years ago
Sonali invests 15% of her monthly salary in insurance policies.
strojnjashka [21]

Answer:

₹42,500

Step-by-step explanation:

Let Sonali's monthly income be ₹x

<h2>According to the question </h2>

15\% \:ofx + 55\% \: of \: x + 12750 = x

=  >  \frac{15}{100} x +  \frac{55}{100} x + 12750 = x

=  >  \frac{70}{100} x + 12750 = x

=  > 12750 = (1 -  \frac{70}{100} )x

=  > 12750 = 30x

=  > x =  \frac{12750 \times 10}{3}

=  > 42500

So your answer will be ₹42,500.

3 0
3 years ago
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