Question

Solve this system of equations using any method. 3x – y = 4 x + 2y = 13

Answer 1

3x-y=4
x+2y=13
elimination
multiply first equation by 2 and add to second
6x-2y=8

6x-2y=8
x+2y=13 +
7x+0y=21

7x=21
divide 7
x=3
sub
x+2y=13
3+2y=13
minu 3
2y=10
divide 2
y=5

x=3
y=5
(3,5)