Answer :
Their ages are determined using the replacement approach.
The age gap between Joy and her brother is ten years.
What is the linear system?
It is an equation system in which one is always the highest power of the variable. a figure with only one dimension and no width. It consists of an endless number of parallel points.
Joy and her brother are a combined age of 24, making them.
Three years older than double Joy's age is her brother.
a disparity in ages between Joy and her brother.
Let x be the age of Joy, and y be the age of her brother.
then in accordance with the first requirement.
x + y = 24 .
(1)\s2x + 3 = y .
The resolution of equations 1 and 2. We obtain x = 7 and y = 2x + 3 y = 17, respectively.
The age gap between Joy and her brother is the next point.
y - x = 17 - 7 = 10
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