18-02-2015
Mathematics

contestada

4x+y=23
3x-y=12 how to do do this

Respuesta :

18-02-2015

[tex] \left \{ {{4x+y=23} \atop {3x-y=12}} \right. \\+---\\add\ both\ equations\\\\ 7x=35\ \ \ | divide\ by \ 7\\\\ x=5\\\\ y=23-4x=23-4*5=23-20=3[/tex]

Answer Link

Otras preguntas

What is the solution to the equation the sqaure root of 5x -7 = the sqaure root of 3x + 5

Find the value of the major arc ABC when the angle measures 40 degrees

Work out the value of the missing angle x.

Write the role of students to maintain social harmony?

help hurry! 10 points

Rolling through the field in the dead of winter is an example of which literary device.

Determine whether each sequence is a geometric sequence If yes, Identify the common ratio 1. 4,12,36,1082. 5,10,15,203. 120,-60,30,-154. -1,-4,16-645. 50,35,20

80.5 rounded to the nearest tenth

A building company completes 42 homes every two months at this right how many homes can become the company complete in six months

***PSYCHOLOGY*** According to the activation-synthesis theory of dreaming, during sleep, conscious experience is driven predominantly by externally generated st