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

You earn 8$ per hour imsurance is 200$ a month how much hours would you have to work to pay for insurance ?

In what ways did agriculture spread? where and why was it sometimes resisted?

A basketball team scored 78 points in their championship win over their rival. The team scored 25 baskets worth 2 points and made seven free throws. How many 3

Twelve years ago, Mandy's father was 5 times as old as she. Mandy's father was 28 years older than she. How old is Mandy now?

What is the maximum number of covalent bonds an element with atomic number 8 can make with hydrogen?

Simplify negative 4 and 1 over 4 − negative 9 and 1 over 2. I already know the answer but could you lease tell me HOW to do it PLZ

If $1500 is invested at an interest rate of 4.75% per year, compounded quarterly, find the value of the investment after the given number of years.

Carbon monoxide (CO) gas reacts with oxygen (O2) gas to produce carbon dioxide (CO2) gas. If 1.00 L of carbon monoxide reacts with excess oxygen at standard tem

Write a program that computes and displays a 15 percent tip when the

How did the spanish conquistador francisco pizarro conquer the incans by 1535?