resolva as equações A -2 × +6=+18
B- 5 × - 3= 2× + 9
C - 3 (2× - 3 ) + 2 ( × + 1 ) = 3× + 18
D - 2 × + 3 (× - 5 ) = 4 × + 9
E - 2 ( × + 1 ) - 3 ( 2 × - 5 ) = 6 × - 3 =
Soluções para a tarefa
Olá,
A- 2x + 6 = 18 | B- 5x - 3 = 2x + 9 | C- 3 (2x - 3) + 2 (x + 1) = 3x + 18
2x = 18 - 6 | 5x - 2x = 9 + 3 | 6x - 9 + 2x + 2 = 3x + 18
2x = 12 | 3x = 12 | 6X + 2x - 3x = 18 + 9 - 2
2x = 12 | x = 12/3 = 4 | 5x = 25
x = 12/2 = 6 | | x = 25/5 = 5
D- 2x + 3 (x - 5) = 4x + 9 | E- 2 (x + 1) - 3 ( 2x - 5) = 6x - 3
2x + 3x - 15 = 4x + 9 | 2x + 2 - 6x + 15 = 6x - 3
2x + 3x - 4x = 9 + 15 | 2x - 6x - 6x = - 3 - 2 - 15
x = 24 | -10x = - 20 (. -1)
| 10x = 20
| x = 20/10 = 2