xxalinax50 xxalinax50

01-09-2020
Mathematics

contestada

Solve for the variable!
1. 2x + 21 = 40
2. 4x - 12 = 3x + 9
3. 3(x -1) + 2 = 7x

Respuesta :

01-09-2020

Step-by-step explanation:

1. 2x + 21 = 40

2x = 40 - 21

2x = 19

x = 19/2 = 9.5

2. 4x - 12 = 3x + 9

4x - 3x = 9 + 12

x = 21

3. 3x - 3 + 2 = 7x

3x - 1 = 7x

-1 = 7x - 3x

-1 = 4x

4x = -1

x = -1/4

= - 0.25

Answer Link

Otras preguntas

what the first thing you should do when you find yourself in a conflict

What does a o'brien sayu to winston in his dream ?

John must have at least 289 test points to pass his math class. He already has test scores of 72, 78, and 70. Which inequality will tell him at least how many m

What is 25% off of $120.00 plus 7.8 sales tax

Adapting and using formulas

If the temperature of our oceans continues to rise, what possible long-term effect will this have on marine organisms?

Select all that apply. Which of the following are purposes of both the female and male reproductive systems? a.) to produce reproductive hormones b.) to produce

All of the following were components of the Virginia Plan EXCEPT:

According to the conversation between cortez and motecuhzoma, (chapter 89, page63) who did motecuhzoma and his chieftain’s think cortez and his men were

Procedure Mix some red color in a glass of water (or fill a glass with a dark red juice such as cranberry juice). Put a celery stalk in the colored water. Wait