PROSZĘ OBLICZYĆ :)
7x + y = 5
5x + 2y = 1
dziękuje ;)
{7x+y=5---|*(-2)
{5x+2y=1
{-14x-2y=-10
-9x=-9
x=1
2y=1-5x
2y=1-5
y=-2
7x + y = 5 /-7x
y = 5 - 7x
5x + 2(5-7x) = 1
-9x + 10 = 1 /-10
-9x = -9 /:(-9)
x = 1
y = -2
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{7x+y=5---|*(-2)
{5x+2y=1
{-14x-2y=-10
{5x+2y=1
-9x=-9
x=1
2y=1-5x
2y=1-5
y=-2
7x + y = 5 /-7x
5x + 2y = 1
y = 5 - 7x
5x + 2(5-7x) = 1
y = 5 - 7x
-9x + 10 = 1 /-10
y = 5 - 7x
-9x = -9 /:(-9)
y = 5 - 7x
x = 1
x = 1
y = -2