kdizzle6505
kdizzle6505 kdizzle6505
  • 24-08-2019
  • Mathematics
contestada

Please help me jog my memory in how to solve a system of equations with the example below

2x + y=4
x - y=-1​

Respuesta :

jimrgrant1 jimrgrant1
  • 24-08-2019

Answer:

(1, 2 )

Step-by-step explanation:

Giving the 2 equations

2x + y = 4 → (1)

x - y = - 1 → (2)

Adding the 2 equations term by term, eliminates the term in y

3x = 3 ( divide both sides by 3 )

x = 1

Substitute x = 1 into either of the 2 equations for corresponding value of y

Substituting x = 1 into (1)

(2 × 1) + y = 4

2 + y = 4 ( subtract 2 from both sides )

y = 2

Solution is (1, 2 )

Answer Link

Otras preguntas

Help!What is the value of x?Enter your answer in the box.cmWhat is the value of x?Enter your answer in the box.x =JUST TO SAVE PEOPLES TIME THE ANSWER IS 94 AND
Federalists supported the new constitution, whereas anit-federalists opposed it ? True or false
!!PLEASE ANSWER ASAP!! The USSR’s formation of the warsaw pact was a reaction to what? a. the establishment of the iron curtain b. the berlin airlift c. the for
You're running a mild fever and you don’t have much of an appetite. You missed one day of school, and you just don't feel like yourself. You're planning to see
PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!! On the first day of a measles outbreak at a school, 8 students were identified to have the measles. Each day f
what is the area of the figure ?
According to mckim, how was the attack like pickett's charge later in the day?
What is 4/7en - 3/7en = ?
what number makes this equation 9×6×5=?×6 true
Wht did handwriting reveal