tamyaharris tamyaharris
  • 11-02-2021
  • Mathematics
contestada

Solve the following systems of equations without graphing
5x + 10y = 30
-5x +15y = 20

Respuesta :

bradleyspengeman
bradleyspengeman bradleyspengeman
  • 11-02-2021

Answer:

(2, 2)

Step-by-step explanation:

In this case, elimination would be the most efficient means of solving.

Simply, add the two equations, and you will be left with only one variable to solve for. (In this case y) You are then able to take your solution and plug it into an equation and solve for x, therefore giving you their intercept.\

5x + 10y = 30

+

-5x + 15y = 20

(x's cancel) 25y = 50

25y = 50

y = 2

5x + 10(2) = 30

5x + 20 = 30

5x = 10

x = 2

The solution to this equation is (2, 2)

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