SOLUTION: solve by elimination method 0.3x-0.2y=4 0.2x+0.54y=-3

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Question 320375: solve by elimination method
0.3x-0.2y=4
0.2x+0.54y=-3
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
0.3x-0.2y=4
0.2x+0.54y=-3
Multiply both equation by 100
1.30x-20y=400
2.20x%2B54y=-300
Multiply eq. 1 by 2 and eq. 2 by -3 and add them to eliminate x.
60x-40y-60x-162y=800%2B900
-202y=1700
highlight%28y=-850%2F101%29
Then from eq. 1,
30x-20%28-850%2F101%29=400
30x%2B17000%2F101=40400%2F101
30x=23400%2F101
highlight%28x=780%2F101%29