Question

solve each system using elimination.
1.) 6x - 3y =15
7x + 14y =10

Tell whether the system has one solution, infinitely many solutions, or no solution.
1.) 9x +8y =15
9x +8y =30

2.) 5x - 3y =10
10x + 6y = 20

Answer 1

6x -3y = 15
7x + 14 y = 10

14(6x - 3y = 15)
3(7x + 14y = 10)

84x - 42y = 210
21x + 42 y = 30
105x = 240
x = 16/7
y = -3/7
(16/7, - 3/7)

1. No Solution
2. Infinitely many solutions

Answer 2

2) the last is wrong.
2. one solution