lamichhanecharchit
lamichhanecharchit lamichhanecharchit
  • 19-12-2020
  • Mathematics
contestada

IF x+y=5 and x-2y=-4 find the value of x and y​

Respuesta :

NgShiYin
NgShiYin NgShiYin
  • 19-12-2020

Answer:

x = 2, y = 3

Step-by-step explanation:

x + y = 5

Shift y to the other side and change to (-y).

x = 5 - y  --- Equation 1

x - 2y = -4 --- Equation 2

Substitute x = 5 - y into Equation 2:

x - 2y = -4

5 - y - 2y = -4

Shift 5 to the other side and change to (-5).

-y - 2y = -4 - 5

Evaluate like terms.

-3y = -9

Divide both sides by -3.

y = -9 ÷ -3

y = 3

Substitute y = 3 into Equation 1:

x = 5 - y

x = 5 - 3

x = 2

Answer Link

Otras preguntas

What is a main challenge faced by plants that live in a desert?
why do castles have flags?
A skeleton forming outside the animal’s body is a(n) a. endoskeleton. b. exoskeleton. c. notochord. d. vertebrate
Why is it necessary for the DNA to replicate prior to cell division? a. so that each daughter cell will have 23 chromosomes b. so that each daughter cell will h
Solve   6v(2v + 3)Please solve and explain this
Using the numbers 2,3,5,8 to make an equation to  equal 104
What are the decomposers of a Desert biome or an example of a food chain for a Desert biome?
How could I measure the hours of light in a day? And how can I make a plan?
Why was the evolution of amphibians notable? What did they pioneer?
Write an algebraic expression for the sum of 18 and a number