erinveri100 erinveri100

02-02-2021
Mathematics

contestada

Solve the simultaneous equations
8x + 3y = 45
2x + 3y = 27

Respuesta :

kirabowen15 kirabowen15

02-02-2021

8x + 3y = 45 * -2
2x + 3y = 27 * 8

-16x - 6y = 90
16x + 24y = 216

24y = 216
y = 216/24
y = 9

8x + 3y = 45
8x + 3(9) = 45

8x + 27 = 45
8x = 45 - 27
8x = 18
x = 18/8
x = 2.25

Answer Link

Otras preguntas

Which words are used as nouns in this sentence? Choose all answers that are correct. Lobsters can pinch the skin with their claws. a. pinch b. their c. skin d

1.How does inertia affect a person who is not wearing a seatbelt during a collision?

what is the main idea of the paragraph. have yo ever wondered how images find there ways onto televisions screen. some tv shows are delivered to homes thro

if x equals 8-(-2.25) and y equals 6-4.2-(-4.9) what is the value of x-y

DNA replication occurs A. so that a cell can grow. B. so that the cell can divide. C. so that proteins can be made. D. so that mutations can be removed.

True or false. Milton was born into a prosperous Puritan family

What percent of 925 is 37%

Which would a historian use most often to research people or events from the past? a. old books and papers b. old buildings and ruins c. old tools and pottery

Cheese sticks that were previously priced at 5 for $1 are now four for $1 find the percent decrease in the number of cheese sticks you can buy for $1

(5y^4-3y^3+2y^2-6y+5)+(-3y^+6y^3-4y^2-4y-8) can someone simplify that