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

After the War of 1812, the first expansionist goal of the republic was the acquisition of

Which answer choice correctly completes the sentence? For centuries, the ship had __________ beneath the waves. A. lie B. laid C. lain D. lay

who is the first president of the united state

Which events sparked World War I? Check all that apply.

Sound or musical elements of poetry may include all but _____. alliteration metaphor rhyme rhythm

Which verb is in the present perfect progressive form? A. has been sleeping B. are listening C. shall have been growing D. had been joking

A marble factory ships marbles using bags of 10, cases of 100, cartons of 1,000, and boxes of 10,000. The factory has an order for 3,570 marbles. How can they

help,.... Solve the volume formula V = lwh for h. a) [tex]h= \frac{V}{l}+w [/tex] b) [tex]h= \frac{lw}{V}[/tex] c) [tex]h= \frac{V}{lw}[/tex] d) [tex]h = Vlw[/

How did Abraham Lincoln affect the construction of the transcontinental railroad?

Which word should not be hyphenated to fit on a line? A. charge B. automatic C. divided D. register