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Firdavs [7]
3 years ago
14

7(n – 1) = -2(3 + n) solve for n

Mathematics
2 answers:
weqwewe [10]3 years ago
8 0
N=1/9 hope this helps
KengaRu [80]3 years ago
8 0
PEMDAS: Parentheses, Exponents, Multiply, Divide, Add, Subtract.
By using PEMDAS, we can already make the equation easier by Multiplying the variables INSIDE the parentheses by whats OUTSIDE of them.
7n-7=-6-2n
Now we combine like terms.
-2n+2n=0 and 7n+2n=9n; 9n-7=-6
-7+7=0 and -6+7=-1; 9n=-1
Now we divide both sides by the coefficient, which is the number in front of the variable.
9n/9=n and -1/9=-0.1111111 repeating.
And now you know the value of n: n=0.1111 repeating (TIP: draw a line OVER the number behind the decimal thats repeating)
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Which of the following expressions are equivalent to x−(−x)+y
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Answer:

C.  None of the above.

Step-by-step explanation:

x − (−x) + y

x + x + y

=  2x + y.

6 0
3 years ago
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7 0
3 years ago
One number is 3 times more than another number. Their sum is 20. What are the two numbers?
Georgia [21]
3x=y
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6 0
3 years ago
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X-70/x<-3 solve for x under the assumption that x>0
Virty [35]

<span>Simplifying 0x + 7 + 5x = 2x + 30 + 40 Anything times zero is zero. 0x + 7 + 5x = 2x + 30 + 40 Combine like terms: 0 + 7 = 7 7 + 5x = 2x + 30 + 40 Reorder the terms: 7 + 5x = 30 + 40 + 2x Combine like terms: 30 + 40 = 70 7 + 5x = 70 + 2x Solving 7 + 5x = 70 + 2x Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2x' to each side of the equation. 7 + 5x + -2x = 70 + 2x + -2x Combine like terms: 5x + -2x = 3x 7 + 3x = 70 + 2x + -2x Combine like terms: 2x + -2x = 0 7 + 3x = 70 + 0 7 + 3x = 70 Add '-7' to each side of the equation. 7 + -7 + 3x = 70 + -7 Combine like terms: 7 + -7 = 0 0 + 3x = 70 + -7 3x = 70 + -7 Combine like terms: 70 + -7 = 63 3x = 63 Divide each side by '3'. x = 21 Simplifying x = 21</span>
4 0
3 years ago
If there are 12 crayons in each box, how many crayons are<br> there in 1 1/2 boxes?
ipn [44]
There are 18 crayons


Explanation:
1 whole = 12 crayon
1/2 of 12 is 6
12+6=18
4 0
2 years ago
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