Question

galera me ajudem nessas conta aqui

1)7x + = 68 - 2x
2)14 - 3x = 2x + 29
3)8x - 9 = 2x + 11
4)10 - 4y = 9 - 2y
5)y = 4 = - 16 + 5y
6)3x + 8 = 12 - x

Answer 1

1) 7x -2x = 68
5x = 68
x = 68/5
x = 13,6

2) -3x -2x = 29 - 14
-5x = 15 .(-1)
5x = -15
x = -15/5
x = -3

3) 8x - 2x = 11 + 9
6x = 20
x = 20/6
x ≈ 3,3

4) -4y + 2y = 9 - 10
-2y = -1 . (-1)
2y = 1
y = 1/2
y = 0,5

5) y - 5y = -16 -4
-4y = -20 .(-1)
4y = 20
y = 20/4
y = 5

6) 3x + x = 12 - 8
2x = 4
x = 4/2
x = 2