Answer
$\text{325 cost of smartphone, and 640 cost of tablet}$
Work Step by Step
Let us consider that $\text{x=cost of smartphone, and}$ $\text{y =cost of tablet}$
We are given:
$340x+250y=270,500~~~~(1) $
and
$x+y=965~~~~(2)$
Re-write equation (2) as: $y=965-x~~~~(3)$
We substitute equation (3) into equation (1):
$340x+250(965−x)=270,500\\ 340x+241,250−250x=270,500
\\ 90x=29250 \\ x=325$
Now, back substitute the value of $x$ into Equation (3) to solve for $y$:
$y=965-325=640$
Therefore, our desired results are:
$\text{325 cost of smartphone, and 640 cost of tablet}$
