a)4m+m
b)xy-10xy
c)-7x-x
d)15a+10-3a
calcule
9x-(5-x)
b)7x+(2-10x)-(x-4)
Soluções para a tarefa
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a) 4m + m =
5m
b) xy - 10 xy =
- 9xy
c) - 7x - x =
- 8x
d) 15a + 10a - 3a =
22a
Calcule:
a) 9x - (5 - x) =
9x - 5 + x =
9x + x = 5
10x = 5
x = 5/10
x = 1/2
x = 0,5
b) 7x + ( 2 - 10 x) - (x - 4) =
7x + 2 - 10x - x + 4 =
7x - 10x - x = - 4 - 2
- 4x = - 6 (-1)
4x = 6
x = 6/4
x = 1,5
5m
b) xy - 10 xy =
- 9xy
c) - 7x - x =
- 8x
d) 15a + 10a - 3a =
22a
Calcule:
a) 9x - (5 - x) =
9x - 5 + x =
9x + x = 5
10x = 5
x = 5/10
x = 1/2
x = 0,5
b) 7x + ( 2 - 10 x) - (x - 4) =
7x + 2 - 10x - x + 4 =
7x - 10x - x = - 4 - 2
- 4x = - 6 (-1)
4x = 6
x = 6/4
x = 1,5
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