A plain prata costs $$(x+3y)$, an egg prata costs $$(2x+y)$, and a cheese prata costs \($(3x-y)\

Question

A plain prata costs $$(x+3y)$, an egg prata costs $$(2x+y)$, and a cheese prata costs $$(3x-y)$. Joshua and Alex are eating together, Joshua orders $2$ plain prata, $2$ egg prata, and $1$ cheese prata. Alex orders $3$ plain prata and $3$ egg prata. Write an expression for the cost of Joshua and Alex's meals. Whose meal costs more? Calculate the the value of $y$ if the difference in their meals' prices is $\$0.50$

Accepted Answer

(a) Joshua: $9x+7y$; Alex: $9x+12y$. (b) Depends on the sign of $y$. (c) $y=\pm0.10$; if additionally $y>0$, $y=0.10$.

Linear Equations and Inequalities - Applications of Linear Equations in Real Life

Linear Equations and Inequalities - Applications of Linear Equations in Real Life

Solution:

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