Question

x/z-y/z=5
x-y=20
z=?

Answer 1

$\frac{x}{z} - \frac{y}{z} = 5 \\ \frac{x - y}{z} = 5$

ți se da x-y deci inlocuiesti

$\frac{20}{z} = 5 \\ z = \frac{20}{5} \\ z = 4$

Answer 2

Răspuns:

z=4

Explicație pas cu pas:

x/z-y/z=5

x-y=20

=>    x/z-y/z=(x-y)/z=20/z=5   => z=20:5  => z=4