Question

Solve by elimination

2x – 5y = 1
3x – 4y = -2

Answer 1

(x3) 6x - 15y = 3
(x -2) -6x + 8y = 4
add the equations together
-7y = 7
y = -7/7 = -1

Answer 2

also, 2x -5(-1) = 1 so 2x + 5 = 1
2x = -4
x = -2

Answer 3

2x - 5y = 1 --->(3)
3x - 4y = -2 -->(-2)
------------------
6x - 15y = 3 (result of multiplying by 3)
-6x + 8y = 4 (result of multiplying by -2)
--------------------add
-7y = 7
y = -1

2x - 5y = 1
2x - 5(-1) = 1
2x + 5 = 1
2x = 1 - 5
2x = -4
x = -2

solution is (-2,-1)

yep...I agree with LanHikari :)

Answer 4

thanks

Answer 5

no problem :)