rozwiaz uklady rownan (2 przyklady)
prosze rozpisac
1.
y=5-7x
8x-6y=10
polączone jest to klamrą {
2.
y=15-13x
11x+17y=45
polaczone klamrą {
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y=5-7x
8x-6y=10
7x+y=5 /*6
8x-6y=10
42x+6y=30
8x-6y=10
50x=40
x=0,8
y=5-5,6
y=-0,6
y=15-13x
11x+17y=45
13x+y=15 /*(-17)
11x+17y=45
-221-17y=-255
11x+17y=45
-210x=-210
x=1
13+y=15
y=2
y=5-7x
8x-6(5-7x)=10
y=5-7x
8x-30+42x=10
y=5-7x
50x-30=10
y=5-7x
50x=10+30
y=5-7x
50x=40 /:50
y=5-7x
y=5-7*0,8
x=0,8
y=5-5,6
x=0,8
x=0,8
y=-0,6
y=15-13x
11x+17y=45
y=15-13x
11x+17(15-13x)=45
y=15-13x
11x+255-221x=45
y=15-13x
210x+255=45
y=15-13x
210x=45-255
y=15-13x
210x=-210 /:210
y=15-13x
x=-1
y=15-13*-1
x=-1
y=15+13
x=-1
y=28
x=-1