Question

complete as sentenças com numeros inteiros .

A) (-12)+(  )=+3 B) (  ) - (+18)= -15

C) (-9).(  ) =+ 54  D)(-50) + (  )= -25

Answer 1

a) 15
b) 33
c) -6
d) 25

Answer 2

a )

$-12+x=3\\x=3+12\\x=15$

b )

$x-18=-15\\x=-15+18\\x=3$

c )

$-9.x=54$

$x=- \frac{54}{9}$

$x=-6$

d )

$-50+x=-25\\x=-25+50\\x=25$