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Kipish [7]
3 years ago
12

2x + 10 + 3x = 7x + 12

Mathematics
2 answers:
wlad13 [49]3 years ago
8 0

Answer:

<h2>x = -1</h2>

Step-by-step explanation:

2x+10+3x=7x+12\qquad\text{combine like terms}\\\\(2x+3x)+10=7x+12\\\\5x+10=7x+12\qquad\text{subtract 10 from both sides}\\\\5x+10-10=7x+12-10\\\\5x=7x+2\qquad\text{subtract}\ 7x\ \text{from both sides}\\\\5x-7x=7x-7x+2\\\\-2x=2\qquad\text{divide both sides by (-2)}\\\\\dfrac{-2x}{-2}=\dfrac{2}{-2}\\\\x=-1

insens350 [35]3 years ago
6 0
First, get all common variables (x and integers in this case) onto the same side.
2x + 3x - 7x = 12 - 10
-2x = 2
x = -2/2
x = -1
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Answer:

Answer:

The total is: $ 1345.5

Step-by-step explanation:

It is given that:

I would like to purchase 20 products at a cost 65.00 per product.

This means that the cost of 20 products will be:

Also, there is a sales tax of 3.5%

This means that a person has to pay a extra 3.5% on the total cost of the items he purchased.

i.e. he need to pay 3/5% on $ 1300

This means that the amount of tax he need to pay is: 3.5% of 1300

                                                                             =  3.5%×1300

                                                                            = 0.035×1300

                                                                           = $ 45.5.

Hence, the total cost is: $ 1300+$ 45.5

This means that the total cost is: $ 134.5

8 0
2 years ago
Do Now 60: What are the formulas to find area for a square, triangle, rectangle, parallelogram, trapezoid, circle, ellipse and e
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Answer:

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Area of ellipse = π × product of major and minor radii

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Step-by-step explanation:

The area of a square is calculated by multiplying the length by itself.

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The area of a rectangle is found by multiplying the length of the rectangle by its breadth

The area of a parallelogram is calculated by multiplying the base of the parallelogram by its height

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3 years ago
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Leno4ka [110]
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Answer:

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