X = the cost of one bush
Y = the cost of one tree
First order: 10x + 4y = $246
Second order: 5x + 3y = $147
Multiply each side of the second order by 2:
10x + 6y = $294
Subtract the first order from the second order:
0x + 2y = $ 48
Divide each side by 2: y = $ 24 .
Plug this new knowledge into the second order:
5x + 3(24) = $147
5x + 72 = $147
Subtract 72 from each side: 5x = $ 75
Divide each side by 5 : x = $ 15
