Solve each system of equation Algebraically?

0 ⤊

Solve each system of equation Algebraically?

1. x + y = 7
x - y= 7

2. 6x + 7y = 19
x + y = 5

3. 3x - 6y = -3
6x + 3y = 9

2007-10-02 12:30:01 · 2 answers · asked by PIMP I 1 in Science & Mathematics ➔ Mathematics

2 answers

Question 1
2x = 14
x = 7
y = 0
Question 2
6x + 7y = 19
-7x - 7y = = - 35----ADD
- x = - 16
x = 16
y = - 11
Question 3
3x - 6y = - 3
12x + 6y = 18-----ADD
15x = 15
x = 1
6 + 3y = 9
3y = 3
y = 1
x = 1 , y = 1

2007-10-06 11:20:40 · answer #1 · answered by Como 7 · 0⤊ 0⤋

1. x =7, y = 0.

2. x = 16, y = -11

3. x = 1, y = 1

2007-10-02 19:42:50 · answer #2 · answered by Topher 3 · 0⤊ 0⤋