Answer:
Step-by-step explanation:
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x=6,y=0
2x+y=12
3x-y=18
5x=30
x=6
6(3)-y=18
18-y=18
y=0
Answer:7+2xy
Step-by-step explanation:apex
3.4 x 10^4
1.6 x 10^4 - 5 x 10^4 = -3.4 x 10^4
5 x 10^4 - 1.6 x 10^4 = 3.4 x 10^4