Proszę o pilne rozwiązanie 2x+4y=94 1x+1y=35
2x+4y=94
x+y=35
x=35-y
2(35-y)+4y=94
70-2y+4y=94
2y = 24
y=12
x=35-12
x=23
spr:
2*23+4*12=94
46+48=94
94=94
odp:
2x+4y=94 |:(-2)
-x-2y = -47
x+y = 35
__________
-y = -12 |*(-1)
y = 12
x+12 = 35
x = 35-12
x = 23
LUB METODĄ PODSTAWIANIA
2x+4y=94 |:2
x+2y =47
x = 35-y
35-y+2y = 47
-y+2y = 47-35
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2x+4y=94
x+y=35
x=35-y
2(35-y)+4y=94
70-2y+4y=94
2y = 24
y=12
x=35-y
x=35-12
x=23
spr:
2*23+4*12=94
46+48=94
94=94
odp:
x=23
y=12
2x+4y=94 |:(-2)
x+y=35
-x-2y = -47
x+y = 35
__________
-y = -12 |*(-1)
y = 12
x+12 = 35
x = 35-12
x = 23
LUB METODĄ PODSTAWIANIA
2x+4y=94 |:2
x+y=35
x+2y =47
x = 35-y
35-y+2y = 47
x = 35-y
-y+2y = 47-35
x = 35-y
y = 12
x = 35-y
y = 12
x = 35-12
y = 12
x = 23