resolva a equação
2,5(x - 2) - 1,5x =1
3,5x + 8 = 2(x + 7)
-3(x - 5) - 2(2x + 1) = -8
Soluções para a tarefa
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a) 2,5*(x - 2) - 1,5x = 1
2,5x - 5 - 1,5x = 1
2,5x - 1,5x = 1 + 5
x = 6
b) 3,5x + 8 = 2*(x + 7)
3,5x + 8 = 2x + 14
3,5x - 2x = 14 - 8
1,5x = 6
x = 6/1,5
x = 4
c) -3*(x - 5) - 2*(2x + 1) = -8
-3x + 15 - 4x - 2 = -8
-3x - 4x= -8 - 15
-1)* -7x = -23
7x = 23
x = 23/7
x = 3,2857
2,5x - 5 - 1,5x = 1
2,5x - 1,5x = 1 + 5
x = 6
b) 3,5x + 8 = 2*(x + 7)
3,5x + 8 = 2x + 14
3,5x - 2x = 14 - 8
1,5x = 6
x = 6/1,5
x = 4
c) -3*(x - 5) - 2*(2x + 1) = -8
-3x + 15 - 4x - 2 = -8
-3x - 4x= -8 - 15
-1)* -7x = -23
7x = 23
x = 23/7
x = 3,2857
marcelfilipe11:
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