Question

Carilah nilai x !

1. 3(2x+8) = 5x+1.

2. 3x/2 = x+1/5

3.7/3 = 5/x

Answer 1

1. 3(2x + 8) = 5x + 1
=> 6x + 24 = 5x + 1
=> 6x - 5x = 1 - 24
=> x = -23.
2. (3x / 2) = (x + 1)/5
=> 5(3x) = 2(x + 1)
=> 15x = 2x + 2
=> 15x - 2x = 2, 13x = 2, maka x = 2 / 13.
3. 7 / 3 = 5 / x
=> 7(x) = 5(3)
=> 7x = 15, maka x = 15 / 7