you multiply the first question by 7. By what number should you multiply the second question?

2 ⤊

you multiply the first question by 7. By what number should you multiply the second question?

2x-5y=1 and -3x+7y= -3

2) What is the solution to this system of equations?
2x+y=7
3x-y=3

2007-12-09 04:52:24 · 1 answers · asked by yankeefan13x 1 in Science & Mathematics ➔ Mathematics

1 answers

Question 1
6x - 15y = 3
- 6x + 14y = - 6-----ADD
- y = - 3
y = 3

2x - 15 = 1
2x = 16
x = 8

x = 8 , y = 3

Question 2
5x = 10
x = 2

4 + y = 7
y = 3

x = 2 , y = 3

2007-12-09 06:09:47 · answer #1 · answered by Como 7 · 2⤊ 0⤋