решите систему линейных уравнений:2x + 3y = -13x - 2y = 4
x=4+2*y
2*(4+2*y)+3*y=-13
8+4*y+3*y=-13
7*y=-21
y=-21/7
y=-3
x=4+2*(-3)
x=4-6
x=-2
ответ: х=-2
у=-3
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x=4+2*y
2*(4+2*y)+3*y=-13
8+4*y+3*y=-13
7*y=-21
y=-21/7
y=-3
x=4+2*(-3)
x=4-6
x=-2
ответ: х=-2
у=-3