Answer:

Step-by-step explanation:
Given: 
To solve this equation, we need to isolate
on one side of the equation algebraically. I see that we have like terms, but they are on opposite sides of the equal sign. Let's add
to both sides.

To isolate x, divide both sides by 7.

Answer:
114 a month for 10 months
Step-by-step explanation:
Answer:
73
Step-by-step explanation:
Let x be the age of Artaud
so - x the opposite
then -x + 40 = 28
so x= 12
his age is 12