розв'язати способом додавання:
в) {0,5x - 0,3y = -1,
{1,5x + 0,4y = 10;
г) {0,2x + 0,1y = -1,
{1,2x + 0,3y = 0;
д) {3/4x + 1/2y = -3,
{3x - 1/3y = -5;
e) {1/4x + 2/3y = 3,
{0,3x + 0,2y = 0.
СРОЧНО!!!! БУДУ ОЧЕНЬ БЛАГОДАРНА!!! ДАЮ 100 БАЛЛОВ!!!!​
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