Question

16 x -42 =9x + 7

12x - 7
---------- =x + 7
5

32x +39 =x +132

Answer 1

$16x - 42 = 9x + 7 \\ 16x - 9x = 7 + 42 \\ 7x = 49 \\ x = 7$

$\frac{12x - 7}{5} = x + 7 \\ 5( \frac{12x - 7}{5} ) = 5(x + 7) \\ 12x - 7 = 5x + 35 \\ 12x - 5x = 35 - 7 \\ 7x = 28 \\ x = 4$

$32x + 39 = x + 132 \\ 32x - x =132 - 39 \\ 31x = 93 \\ x = 3$