Question

using elimination method solve 3x+y=13 and x-3y+9=0 with step by step explanation​

Answer 1

Answer:

the equation is 3x+y=13 and x-3y+9=0

Step-by-step explanation:

3x+y=13 let equation -1

x-3y=-9 [shift the 9 to the right side] let equation -2

[now multiply by 3 in x-3y=-9]

after multiplication= 3x+y=13

                                    3x-9y=-27

now subtract equation 2 from 1

3x+y=13

-3x+9y=27

10y=40 [answer after subtraction]

y=40/10

y=4

now put the value of y in equation 1

3x+y=13

3x+4=13

3x=13-4

3x=9

x=9/3

x=3

the value of x=3 and y=4

hope it will help you....