proszę o rozwiązanie układu równań :)
A) 1/5x+3/10y=2
- 2x-y=-18
b) -12x+y=1
4x+1/3y=1
-2x-y=-18
-y = -18 + 2x
y = 18 - 2x
1/5x + 3/10y = 2/*5
x +3/2y = 10
x + 3/2 * (18 - 2x) = 10
x + 27 - 3x = 10
-2x = 10-27
-2x = -17 /: (-2)
x = 17/2
x = 8 i 1/2
y = 18 - 2 * 8 i 1/2
y = 18 - 17
y = 1
licze na naj :D
1.
1/5x+3/10y=2
y=18-2x
2x+3y=20
2x+3(18-2x)=20
2x+54-6x=20
-4x=34
x=8,5
y=1
2.
-12x+y=1
y=1+12x
12x+y=3
12x+1+12x=3
24x=2
x=1/12
y=3
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-2x-y=-18
-y = -18 + 2x
y = 18 - 2x
1/5x + 3/10y = 2/*5
x +3/2y = 10
x + 3/2 * (18 - 2x) = 10
x + 27 - 3x = 10
-2x = 10-27
-2x = -17 /: (-2)
x = 17/2
x = 8 i 1/2
y = 18 - 2 * 8 i 1/2
y = 18 - 17
y = 1
licze na naj :D
1.
1/5x+3/10y=2
- 2x-y=-18
y=18-2x
2x+3y=20
2x+3(18-2x)=20
2x+54-6x=20
-4x=34
x=8,5
y=1
2.
-12x+y=1
4x+1/3y=1
y=1+12x
12x+y=3
12x+1+12x=3
24x=2
x=1/12
y=3