20 points if you solve!
question 1
solve by the linear combination method.
8x + 2y = 4
β4x + 3y = β10
(1, 3)
(2, 3)
(1, 2)
(1, β2)
question 2
solve by the linear combination method.
2x + 3y = β17
5x + 2y = β4
(3, β1)
(β2, 2)
(β1, 3)
(2, β7)
question 3
solve by the linear combination method.
3x β 5y = 7
2x + 3y = 30
(3, β7)
(3, 7)
(9, 4)
(β3, β7)
question 4
solve by the linear combination method.
x + y = 50
0.05x + 0.06y = 2.8
(20, 30)
(40, 60)
(10, 30)
(20, β50)
question 5
solve by the linear combination method.
6x β 2y = 2
β3x + 4y = 5
(1, 3)
(1, β2)
(2, 3)
(1, 2)