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lapo4ka [179]
3 years ago
6

How do you solve this equation? 4x-(2x-8)=-(3x-6)

Mathematics
1 answer:
balu736 [363]3 years ago
8 0
4x-(2x-8)=-(3x-6)

 4x- 2x + 8 =- 3x + 6
 2x + 3x = 6 - 8
  5x = -2 
    x = -2/5

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Answer:1

Step-by-step explanation: The problem states that each row has only one kind of trophy so the only answer i could think of is one

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Noah is buying a pair of jeans and using a coupon for 10%off. The total price is $56.70 which includes $2.70 in sales tax. Noah’
lora16 [44]

Answer:

See below.

Step-by-step explanation:

So, we know that Noah's purchase can be modeled by the equation:

x-0.1x+2.70=56.70

Part 1)

The solution to the equation will be the value of x.

In this case, x will represent the original price of the jeans.

We know that Noah has a coupon for 10% off the <em>original price of the jeans</em>.

So, 0.1x will represent how much of the original price Noah gets a a discount on.

Therefore, (x - 0.1x) represents the total cost of the jeans <em>after</em> the coupon.

So, x is our original price of the jeans.

Part 2)

To verify that 70 is <em>not</em> a solution, we can simply substitute 70 for x and check whether or not the equation is true. So:

(70)-0.1(70)+2.7\stackrel{?}{=}56.70

Multiply:

70-7+2.7\stackrel{?}{=}56.7

Subtract:

63+2.7\stackrel{?}{=}56.7

Add:

65.7\neq56.7

However, we <em>can</em> verify that 60 <em>is</em> the solution by substituting. So, substitute 60 for every x:

(60)-0.1(60)+2.7\stackrel{?}{=}5.7

Multiply:

60-6+2.7\stackrel{?}{=}56.7

Subtract:

54+2.7\stackrel{?}{=}56.7

Add:

56.7\stackrel{\checkmark}{=}56.7

So, 60 is indeed the solution and is the value of x.

So, this means that $60 was the original price of the jeans.

8 0
3 years ago
Read 2 more answers
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Answer:

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Step-by-step explanation:

you just simplify the expression divide it by 2 on both side and it ends up to 3 out of 7

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3 years ago
Which expression have a value -7
vlabodo [156]

x+7=0

x=-7

.....................

3 0
3 years ago
POSSIBLE POINTS: 5
Bumek [7]

Answer:

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Step-by-step explanation:

88 blue marbles, 55 green marbles, and 88 red marbles =231 marbles

P (blue or red marble) = number of red or blue/ total

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                                      =176/231

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3 years ago
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