solve x and y 0.4x-1.5y=6.5,0.3x-0.2y=0.9
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x = 217/37 & y = 159/37 if 0.4x-1.5y=6.5,0.3x-0.2y=0.9
Step-by-step explanation:
0.4x - 1.5y = 6.5 Eq1
0.3x - 0.2y = 0.9 Eq2
3 * Eq1 - 4 * Eq2
=> 1.2x - 1.2x - 4.5y + 0.8y = 19.5 - 3.6
=> -3.7y = 15.9
=> y = - 15.9/3.7
=> y = 159/37
0.3x-0.2y=0.9
=> 0.3x - 0.2 * 159/37 = 0.9
=> 11.1x - 31.8 = 33.3
=> 11.1x = 65.1
=> x = 651/111
=> x = 217/37
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