2x+7=27 and 3x+1=28 does 2x+7= 3x+1

2 answers:

6 0

Assuming that you are asking this :

Does 2x + 7 = 27 equal 3x + 1 = 28 ?

Let's first solve for 2x + 7 = 27

2x + 7 = 27

Subtract 7 from both sides.

2x = 27 - 7

Simplify.

2x = 20

Divide both sides by 2.

x = 10

Then, solve for 3x + 1 = 28

3x + 1 = 28

Subtract both sides by 1.

3x = 28 - 1

Simplify.

3x = 27

Divide both sides by 3.

x = 9

10 ≠ 9 therefore, 2x + 7 ≠ 3x + 1

~Hope I helped!~ :)

Savatey [412]2 years ago

5 0

Hey there!

2x + 7 = 27
2x = 20
x = 10

3x + 1 = 28
3x = 27
x = 9

The values for both of these equations are 9 and 10; therefore, the answers are not equivalent.

I hope this helps!

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Jim needs to rent a car. A rental company charges $21.00 per day to rent a car and $0.10 for every mile driven.

Ulleksa [173]

Answer:

$21d+25\leq 115$

Max is 4 days.

Step-by-step explanation:

An inequality is a math statement with more the one solution. The solution has a range of values for which the inequality can be satisfied. It has the same following components as an equation: variables and operations. However, the equal sign is replaced by an inequality sign: $,\leq,\geq$ .

We start by choosing a variable for an unknown value. Here is it the number of days he rents the car. We choose d.

We know he rents it for $21 pr day or 21d for any number of days. We also know her will drive 250 miles at $0.10 per mile or 0.10(250). We will combine the two into an expression.

21d + 0.10(250)

We know his limit is $115. This means he can rent the car for any number of days until he reaches $115. The charge must be less than or equal to 115.

So we write $21d+0.10(250)\leq 115$ .