sophiazjackson sophiazjackson

03-10-2021
Mathematics

contestada

what is the value of x in the solution to this system of equations?
4x + 7y = 85
x = 2y - 5

A) 11
B) 24
C) 6
D) 9

Respuesta :

seetha1980 seetha1980

03-10-2021

Answer:

D) x=9

Step-by-step explanation:

x = 2y- 5

2y = x + 5

y = (x+5) / 2

4x + 7(x+5)/2 = 85

8x + 7x + 35 = 85*2

15x + 35 = 170

15x = 170 - 35 = 135

x = 135/15 = 9

Answer Link

Otras preguntas

___________________ motivated sequence is an organizational framework that speakers on propositions of policy find particularly effective in motivating receiver

There are 40 flamingos at the zoo.if 3/4 of the flamingos are standing on one leg ,and the rest are standing on both legs. How many flamingo feet are touching t

Why is the United States Constitution called a "living document"?

In the figure, find the m<5 if m<3 =115

A quadrilateral with exactly two right angles is a ____. a. trapezoid c. rectangle b. square d. hexagon

if a country has a low GDP, it __________. A. produces a low number of goods each year, resulting in an economically rich nation B. produces a high number o

Help on question c please

What is the meaning of life.

which statement accurately describes the impact of technology on world war 1

what is the correct description of the product of the expression 2 3/4x 3/3 A. is the product is less than each factor B. The product is greater than each facto