Question 1111653
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<U>Be aware</U>: &nbsp;&nbsp;The solution/the answer by other tutor is &nbsp;&nbsp;<U>D E A D L Y  &nbsp;&nbsp;&nbsp;&nbsp;W R O N G</U>.


Below please find a correct solution.


<pre>
 8x + 2y = 1260        (1)
10x + 5y = 1950        (2)


Multiply eq(1) by 5.  Multiply eq(2) by 4.  You will get

40x + 10y = 5*1260     (1')

40x + 20y = 4*1950     (2')


Subtract eq(1') from eq(2').  You will get

10y = 4*1950 - 5*1260 = 1500  ====>  y = {{{1500/10}}} = 150 dollars.

Then from (1),  x = {{{(1260-2*150)/8}}} = 120 dollars.


<U>Answer</U>.  $120  for  bricklayer;  $150 for roofer.


<U>Check</U>.   120*8 + 150*2 = 1260    ! Correct !

         120*10 + 150*5 = 1950   ! Correct !
</pre>

Solved.