raduion4354 raduion4354
  • 14-09-2019
  • Mathematics
contestada

Solve each of the following equations for x. (a) 5x-7=28 (b) 12-5x= x+30 (c) 5(x+2)= 1-3x
Зx-y=-5 X+2y=3

Respuesta :

slicergiza slicergiza
  • 17-09-2019

Answer:

(a) 7

(b) -3

(c) [tex]-\frac{9}{8}[/tex]

(d) -1

Step-by-step explanation:

(a) 5x - 7 = 28

5x = 28 + 7

5x = 35

⇒ x = 7

(b) 12 - 5x = x + 30

-5x = x + 30 - 12

-5x = x + 18

-5x - x = 18

-6x = 18

⇒ x = -3

(c) 5(x+2) = 1 - 3x

5x + 10 = 1 - 3x

5x = 1 - 3x - 10

5x + 3x = -9

8x = -9

⇒ x = [tex]-\frac{9}{8}[/tex],

(d) Given system of equations,

Зx-y = -5 ------(1),

x + 2y = 3 ----(2),

Equation (2) + 2 equation (1),

x + 6x = 3 - 10⇒ 7x = -7 ⇒ x = -1

Answer Link

Otras preguntas

Ask you Identify the terms of the expression 6x + 5y + 3. (Points : 1) r question here
what is 1.36,1.3 and 1.63 from least to greatest
How would a person living in a moderate climate (not too hot, not too cold) most likely lose the greatest amount of water? A) perspiration B) Urine C) Exhalatio
Estimate the product of 496 and 351
what are three ways that the density of ocean water can increase?
Why is Chillingworth called a "leech"? In the scarlet letter by Nathaniel Hawthorne
What number should be added to the expression x^2 + 4x to change it into a perfect square trinomial?
What is the momentum of a 75.0-kilogram defensive back chasing the fullback at a velocity of 5.00 m/sec.
how do you say i love dogs in french
hi um where does an apostrophe go in pilgrims place