Решите систему уравнений способом сложения:
1) { x + 2y = 10
{ 4x - 3y = 12
2) { 5x - 2y = 3
{ 10x + 10y = 27
1) { x + 2y = 10
{ 4x - 3y = 12
2) { 5x - 2y = 3
{ 10x + 10y = 27
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Answers & Comments
{ 10x + 10y = 27
{-10x+4y=-6
{ 10x + 10y = 27
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14y=21
y=1.5
10x+10*1.5=27
10x=27-15
10x=12
x=1.2