Ldemeter Ldemeter
  • 04-06-2018
  • Mathematics
contestada

Solve the system of equations algebraically:

2x - y = -1
3x + y = 6

Respuesta :

KyngOyinda
KyngOyinda KyngOyinda
  • 04-06-2018
using substitution method
from the first equ
2x+y=-1
y= -1-2x --------(3)
put equ 3 into equ 2
3x -1-2x=6
3x-2x=6+1
x =7
put x+7 into equ 1
2(7) + y = -1
14 + Y =-1
y= -1-14
y=-15
so
x=7 and y=-15
Answer Link

Otras preguntas

find all values of x in the interval [0, 2????] that satisfy the inequality. (enter your answer using interval notation.)
Strengths and weaknesses in a Mixed economy
Order the following numbers from greatest to least: 7.321, 7.3, 7.065, 7.65
Which trade commodity did the French focus on that also became the basis of the first industry in Oklahoma?gold Fur spice​
divide milk and coffee, each person gets the same amount of milk coffee but different proportions, one of them has 1/ 4 cups of coffee and 1/6 of milk, for a to
Write any two ways in which climate is a resource?​
Which point has coordinates (−2, 1.5) ?
cells in the body exist in an aqueous environment. they are constantly surrounded by water or a solution that contains water.
the annual salaries of all employees at a financial company are normally distributed with a mean mu
If LM = 4, MN = 8x, and LN = 10x, what is MN?