Question

Tolong dibantu ya.. yang nomor 1,2,3,6,10

Answer 1

1. x + (-5) = 12
=> x = 12 + 5
=> x = 17

2. 3x - 2 + 4x = 8 + 4x
=> 3x + 4x - 4x = 8 + 2
=> 3x = 10
=> x = 10/3
=> x = 3 1/3

3. 5(x - 1) = 4x
=> 5x - 5 = 4x
=> 5x - 4x = 5
=> x = 5

6. 2(5 - 2x) = 3(5 - x)
=> 10 - 4x = 15 - 3x
=> - 4x + 3x = 15 - 10
=> - x = 5
=> x = - 5

10. - 2x + 5 = - (x + 9)
=> -2x + 5 = -x - 9
=> -2x + x = -9 - 5
=> -x = -14
=> x = 14