mario is x years old. In 7 years he will be 19. Which equation can be used to determine mario’s present age?
The equation that can be used to determine Mario's present age is:
x + 7 = 19
Let's solve this step-by-step.
Step 1: Let's represent Mario's present age as "x."
Step 2: In 7 years, Mario will be 19. We can express this as "x + 7 = 19."
Step 3: To determine Mario’s present age, we need to solve for "x" in the equation "x + 7 = 19."
Step 4: Subtract 7 from both sides of the equation to isolate "x":
x + 7 - 7 = 19 - 7
x = 12
Therefore, Mario's present age is 12 years old.
To determine Mario's present age, we need to set up an equation based on the given information. Let's denote Mario's current age as "x".
According to the information given, in 7 years, Mario will be 19. This means that Mario's age in 7 years would be x + 7 (since we're adding 7 years to his current age).
So, the equation that represents this relationship is:
x + 7 = 19
To find Mario's present age, we need to solve this equation for "x". We can do this by isolating "x" on one side of the equation.
x + 7 - 7 = 19 - 7
x = 12
Therefore, with this equation, we can determine that Mario's present age is 12 years old.