Solve the following systems of equations:0.5x + 0.7y = 0.740.3x + 0.5y – InterviewSolution

1.

Solve the following systems of equations:0.5x + 0.7y = 0.740.3x + 0.5y = 0.5

Answer»

0.5x + 0.7y = 0.74

0.3x + 0.5y = 0.5

Multiplying eq1 by 0.3 and eq2 by 0.5 and subtracting eq1 from eq2

⇒ 0.15x + 0.25y – 0.15x – 0.21y = 0.25 – 0.222

⇒ 0.04y = 0.028

⇒ y = 0.7

Thus,

x = 0.5

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