Question

How do you solve 5x+y=5 and 10x+3y=20?

Answer 1

Answer:

x = -1

y = 10

Step-by-step explanation:

First equation  5x + y = 5

Second equation  10x + 3y = 20

These two linear equations in two variables can be solved easily by elimination method.

Firstly, multiply the first equation by 2 that gives 10x + 2y = 10   ----- (i)

Now subtract (i) from second equation, that gives

10x – 10x + 3y – 2y = 20 – 10

=>  y = 10

Putting value of y in first equation,

5x + 10 = 5

5x = -5

=>  x = -1