Answer:
Joe's age is 93 years
Aaron's age is 31 years
Christina's age is 25 years
Step-by-step explanation:
Let
x ---->Joe's age
y ----> Aaron's age
z----> Christina's age
we know that
Joe"s Age Is three times Aaron's age
----> equation A
Aaron is six years older than Christina
isolate the variable z
----> equation B
The sum of their ages is 149
----> equation C
solve the system by substitution
substitute equation A and equation B in equation C
solve for y
Combine like terms left side
Adds 6 both sides
Divide by 5 both sides
<em>Find the value of x</em>
----> 
<em>Find the value of z</em>
---- 
therefore
Joe's age is 93 years
Aaron's age is 31 years
Christina's age is 25 years
Answer:
Step-by-step explanation:
Additive identity is a property that involves the sum of two or more integers in an equation without compromising the equality of the equation.
Given the equation
(5+2)+n = 7+n
We can see that the right hand side of the equation is derived from the left hand had by addition of the values in parenthesis.
Given the right hand side;
= 5+2+n
= (5+2)+n
adding the expression in parenthesis will give;
= 7 + n
Since we added the expression in parenthesis to arrive at the expression at the right hand side, hence additive identity was used in the calculation.
Answer:
The division operation!
Step-by-step explanation:
when you multiple two variables, the one way to undo then is division.
Hope this helps! :)
Answer:
x=45
Step-by-step explanation:
70+65=135
180-135=45
