0.4x+0.3y=1.7 and 0.7x+0.2y=0.8
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Answer:
0.4x+0.3y=1.7 (1) ×0.7
0.7x0.2y=0.8 (2) ×0.4
0.49x+0.21y=1.19
0.49x+0.08y=0.32
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0.13y=0.87
y=6.69
1
0.4x+0.3×6.69=1.7
0.4x +2.007=1.7
0.4x=-0.307
x=0.7675
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