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

Find the variance of the data. 251, 224, 237, 255, 268 X = 247 Variance (0²) = [?]

Will you marry me ?

Mrs Reed buys a car costing £11760 This cost includes VAT at a rate of 20%. How much is the VAT?

Create a flowchart to find the total of 10 negative numbers start from -1.

A golfer needs your help to choose which club to use for their next stroke. Some things you need to know include:Consider that the ball will travel directly bet

On January 1, 2021, you deposited $8,000 in a savings account. The account will earn 8 percent annual compound interest, which will be added to the fund balance

how to place answer in brainly

According to the stem-and-leaf plot above, how many drivers travel below 80 miles hour per hour? A 2 B 14 C 6 D 5

On January 1, 2021, you deposited $8,000 in a savings account. The account will earn 8 percent annual compound interest, which will be added to the fund balance

the people on the train are jk the following ratios men:children=5:3 women:children=3:2 find the ratio men:women in its simplest form