Mario is z years old. In 7 years, he will be 19. Which equation can be used to determine Mario's present age? (1 point)
Let's create an equation to determine Mario's present age:
Let's assume Mario's present age is x.
According to the given information, in 7 years, Mario will be 19. So, his age in 7 years will be x + 7.
Therefore, we can write the equation as follows:
x + 7 = 19
So, the equation that can be used to determine Mario's present age is:
x + 7 = 19
z + 7 = 19
To determine Mario's present age, we can set up an equation using the information given.
Let's assume Mario's present age is "x" years.
According to the problem, in 7 years, Mario will be 19 years old. This means that his age in 7 years would be x + 7 = 19.
To determine Mario's present age, we need to solve for x. To isolate x, we can subtract 7 from both sides of the equation:
x + 7 - 7 = 19 - 7
x = 12
So, to determine Mario's present age, the equation x + 7 = 19 can be used, where x = 12.