x + 1 = 5(y + 2)
3(2x - 5) - 4(3y - 4) = 19
из первого вычисляем х и подставляем во второе
x = 5(y + 2) - 1 = 5y + 10 - 1 = 5y + 9
--
6x - 15 - 12y + 16 = 19
6x - 12y = 18
6(5y + 9) - 12y = 18
30y + 54 - 12y = 18
18y = -36
y = -2
6x - 12*(-2) = 18
6x + 24 = 18
6x = -6
x = -1
ответ (-1, -2)
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Verified answer
x + 1 = 5(y + 2)
3(2x - 5) - 4(3y - 4) = 19
из первого вычисляем х и подставляем во второе
x = 5(y + 2) - 1 = 5y + 10 - 1 = 5y + 9
--
6x - 15 - 12y + 16 = 19
6x - 12y = 18
6(5y + 9) - 12y = 18
30y + 54 - 12y = 18
18y = -36
y = -2
6x - 12*(-2) = 18
6x + 24 = 18
6x = -6
x = -1
ответ (-1, -2)