Answer:
3.) 42-x=42
Answer
Solutions
42-x=42 --> The 42 change to 0
because same number
-×0
x=0
Therefore, the answer is x=0
●●●●●●●●●●●●●●●●●●●●●●●●●
4.) 18.5+×=21
Answer
Solutions
18.5+×=21 --> subtract (18.5) to both sides
+18.5-18.5x=21+18.5 --> +18.5-18.5=0 and
21+18.5= 2.5
x=2.5
Therefore, the answer is x=2.5
●●●●●●●●●●●●●●●●●●●●●●●●●
5.) x-2.35=4.25
Answer
Solutions
x-2.35=4.25 --> Add (2.35) to both sides
x-2.35+2.35=4.25+2.35 --> -2.35+2.35=0
and 4.25+2.35= 6.6
x=6.6
Therefore, the answer is x=6.6
#Brainly is fun