Question

x+3y=14
2x-7=7

preciso de ajuda por favor

Answer 1

2x-7=7
2x=7+7
2x=14
x=14/2
x=7

x+3y=14
7+3y=14
3y=14-7
3y=7
y=7/3

Answer 2

2x-7=7
x+3y=14 *(-2)

2x-7=7
-2x-6y=-28
-6y-7=-21
-6y=-14 *(-1)
6y=14
y=14/6
y=7/3

x+3y=14
x+3*7/3=14
x+21/3=14
x+7=14
x=7