$\frac{x + 4}{5} = 1$
x + 4 = 1 * 5
x + 4 = 5
x = 5 − 4
x = 1

$\frac{2x - 3}{3} = -5$
2x − 3 = −5 * 3
2x − 3 = −15
2x = −15 + 3
2x = −12
$x = -\frac{12}{2}$
x = −6

$\frac{x - 7}{3} = -2$
x − 7 = −2 * 3
x − 7 = −6
x = −6 + 7
x = 1

$\frac{3x + 1}{2} = 8$
3x + 1 = 8 * 2
3x + 1 = 16
3x = 16 − 1
3x = 15
$x = \frac{15}{3}$
x = 5