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 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

Solve for x. Round to the nearest thousandth (0.001) if necessary. 11^x = 22
What sports would you like to see in the Summer Olympics ?
For what values of c will the quadratic equation below have two real solutions. 8x^2 − 13x + c = 0 Enter the answer as an inequality with c rounded to the neare
please tell me fast in hindi​
Determine the amount of work done by the applied force when a 87 N force is applied to move a 15 kg object a horizontal distance of 4.5 meters at a constant spe
Please help, Find the area of the figure
Can somebody help me out
How long is a pencil the nearest inch and to the nearest centimeters?
If the earth is like _______________________, then the greenhouse gases are like _________________. (come up with a metaphor)
What is the molecule in this image? amino acid amino acid A. A carbohydrate B. A nucleic acid C. A protein D. A lipid