Posted by DJ on Friday, January 20, 2012 at 9:11pm.
Please help me to solve by substitution method.
7x+8y =44
x=415y

Math question  Patty, Friday, January 20, 2012 at 9:58pm
7 x 415y+8y=44
287+3y=44
3y=287+44
3y=243
y=243 divided by 3
y=81

Patty is incorrect  Math question  Reiny, Friday, January 20, 2012 at 11:08pm
Patty should have used brackets
in 7x + 8y = 44
7(415y) + 8y = 44
287  35y + 8y = 44
27y = 243
y = 9
then in x= 415y
x = 4145
x = 4
so x=4 and y = 9
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