Hi there! :)
Answer:
a=59
*The answer must have a positive sign.*
Step-by-step explanation:
[tex]a+c=b+c[/tex]
First, you add by 17 from both sides of an equation.
[tex]a-17+17=42+17[/tex]
And then, you simplify and solve. You can also add by the numbers from left too right.
[tex]42+17=59[/tex]
Final answer is a=59
Hope this helps! :)
Have a great day!
-Charlie
