Question

Ex 7
Vaaaa roggg
Repedeeeeee
Dau coroanaaaa!!!!!

Answer 1

$a)y - z = 9$

$xy - xz = - 36$

$x(y - z) = - 36$

$x \times 9 = - 36$

$x = - 36 \div 9$

$x = - 4 \: \in \: \mathbb{Z}$

$b)y - z = - 17$

$xy - xz = - 156$

$x(y - z) = - 156$

$x \times ( - 17) = - 156$

$x = - 156 \div ( - 17)$

$x = \frac{156}{17} \notin \: \mathbb{Z}$

$c)y - z = - 17$

$xy - xz = 187$

$x(y - z) = 187$

$x \times ( - 17) = 187$

$x = 187 \div ( - 17)$

$x = - 11 \: \in \: \mathbb{Z}$