Question 1064593

Solve system by substitution 
x-2y=-7
8x-2y=0
<pre>x - 2y = - 7_____x = 2y - 7 ----- eq (i)
8x - 2y = 0 ------- eq (ii)
Note also that eq (ii) can remain as is, or it can be REDUCED by dividing it by its GCF, 2
8(2y - 7) - 2y = 0 -------- Substituting 2y - 7 for x in eq (ii) ------ eq (ii)
16y - 56 - 2y = 0
16y - 2y = 56
14y = 56
{{{y = 56/14 = 4)}}}
x = 2(4) - 7 ------ Substituting 4 for y in eq (i) 
{{{x = 8 - 7 = 1}}}
{{{highlight_green(matrix(1,3, "Solution:", "(1,", "4)"))}}}