Answer:
0=0
The input is an identity: it is true for all values
Step-by-step explanation:
3
(
4
−
7
)
=
−
2
1
+
1
2
Solve
Distribute
3(4z−7)=−21+12z
1
2
−
2
1
=
−
2
1
+
1
2
Rearrange terms
1
2
−
2
1
=
−
2
1
+
1
2
1
2
−
2
1
=
1
2
−
2
1
add 2
1 to both sides of the equation
12
−
2
1
=
1
2
−
2
1
1
2
−
2
1
+
2
1
=
1
2
−
2
1
+
2
1
simplify
Add the numbers
12z = 12z
Subtract 12 from both side of the equation
1
2
=
1
2
12z-
12z= 1
2
−
12
Simplify, combine like Terms
0=0
Hope this helps.
