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davidd13221
@davidd13221
July 2023
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Розв'яжіть систему рівнянь:
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1Manka1
{5x-3y=19
{2x+y=1
{y=1-2x
{5x-3y=19
5x-3(1-2x)=19
5x-3+6x=19
5x+6x=19+3
11x=22
x=22/11
x=2
y=1-2*2
y=-3
(x;y)=(2;-3)
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Answers & Comments
{2x+y=1
{y=1-2x
{5x-3y=19
5x-3(1-2x)=19
5x-3+6x=19
5x+6x=19+3
11x=22
x=22/11
x=2
y=1-2*2
y=-3
(x;y)=(2;-3)