Question

Решите системы уравнений
5(x+y) = 7 + 4х,
3(x+y) = 4 -y

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Answer 1

5x+5y=7+4x

3x+3y=4-y

x=7-5y

3x=4-4y

12-12y=7-5y

y=5/7

x=7-5*5/7=24/7