Question

completar con el numero que verifique la igualdad
D) -60:( )-5=7
E) ( +3).4=-20
F -36:( -1)+7=-2

Answer 1

-60:x-5=7
-60/x=7+5
-60/x=12
-60/x=12x/x
-60=12x
X=-60/12
X=-5

(X+3)x4=-20
4x+12=-20
4x=-20-12
4x=-32
X=-32/4
X=-8

-36:(x-1)+7=-2
-36:(x-1)=-2-7
-36:(x-1)=-9
-36=-9(x-1)
-9=-9x+9
-9-9=-9x
-18=-9x
X=-18/-9
X=2