Posted by Edith on Saturday, February 11, 2012 at 12:36pm.
How do I solve this using substitution method?
7x+9y=38
6x+y=50

Math  Steve, Saturday, February 11, 2012 at 5:15pm
solve either equation for x or y and substitute it into the other equation:
6x+y = 50
y = 6x+50
so,
7x+9(6x+50) = 38
7x + 54x + 450 = 38
61x = 488
x = 8
now, use that value in either equation to get y:
y = 6(8) + 50 = 2
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