1) {5 (x + y) = 7 + 4x {3 (x + y) = -4 - y

Question

1) {5 (x + y) = 7 + 4x {3 (x + y) = -4 - y

Answer 1

Ответ:

(7;0) (0;-1)

Пошаговое объяснение:

{5х+5у=7+4х {3х+3у=-4-у

{5х-4х=7-5у {3у+у=-4-3х

{х=7-5у {4у=-4-3х

{7-5у=7-5у {-4-3х=-4-3х

{у=0 {х=0

{х=7-5×0 {4у=-4-3×0

{х=7 {4у=-4

{х=7 {у=-1

Comments

Спасибо

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