Rozwiąż układ równań metodą przeciwnych współczynników:
2x+2y=20
x+2=y-2
Proszę o pomoc
2x+2y=20 28+2y=20x+2y=2 0+2y=2
2x + 2y = 20
x - y = -2 -2
x - y = -4 /*2
2x - 2y = -8
2x + 2y + 2x - 2y = 20 -8
4x = 12 /:4
x= 2
2 * 2 + 2y = 20
4y = 16 /:4
y= 4
spr:
2x+2y=20x+2=y-22 * 2 + 2* 8 = 202 + 2 = 8- 220 = 204 = 4
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2x+2y=20 28+2y=20
x+2y=2 0+2y=2
2x+2y=20
x+2=y-2
2x + 2y = 20
x - y = -2 -2
2x + 2y = 20
x - y = -4 /*2
2x + 2y = 20
2x - 2y = -8
2x + 2y + 2x - 2y = 20 -8
4x = 12 /:4
x= 2
2x + 2y = 20
2 * 2 + 2y = 20
4y = 16 /:4
y= 4
spr:
2x+2y=20
x+2=y-2
2 * 2 + 2* 8 = 20
2 + 2 = 8- 2
20 = 20
4 = 4