Question 1025494
Let X be the number of method I tables, Y method II tables.
1.{{{1.5X+2.5Y=231}}}<--- Hours spent
2.{{{9X+5Y=1026}}} <--- Cost
Multiply eq. 1 by 2 and subtract from eq. 2.
{{{9X+5Y-3X-5Y=1026-462}}}
{{{6X=564}}}
{{{X=94}}}
So then,
{{{9(94)+5Y=1026}}}
{{{846+5Y=1026}}}
{{{5Y=180}}}
{{{Y=36}}}