resolva o sistema de equacoes...
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a) 2x + 4y = 6
- 2x + 2y = -12
6y = -6
y= -6/6
y= -1
2x + 4y = 6
2x + 4×(-1) = 6
2x - 4 = 6
2x = 6+4
2x = 10
x = 10/2
x= 5
b)4x + 6y = 10
6x + 4y = 10
4x + 6y = 10 ( -3)
6x + 4y = 10 ( 2)
-12x - 18y = -30
12x + 8y = 20
-18y + 8y = -30 + 20
-10y = -10
y= -10/ -10
y= 1
4x + 6 × 1 = 10
4x + 6 = 10
4x = 10 - 6
4x= 4
x = 4/4
x= 1
- 2x + 2y = -12
6y = -6
y= -6/6
y= -1
2x + 4y = 6
2x + 4×(-1) = 6
2x - 4 = 6
2x = 6+4
2x = 10
x = 10/2
x= 5
b)4x + 6y = 10
6x + 4y = 10
4x + 6y = 10 ( -3)
6x + 4y = 10 ( 2)
-12x - 18y = -30
12x + 8y = 20
-18y + 8y = -30 + 20
-10y = -10
y= -10/ -10
y= 1
4x + 6 × 1 = 10
4x + 6 = 10
4x = 10 - 6
4x= 4
x = 4/4
x= 1
stefani635:
OBRIGADO!!!☺
2x + 4×(-1) = 6
2x - 4 = 6
2x = 6+4
2x = 10
x = 10/2
x= 5
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