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solve by substitution

0 votes

x +5y = 2

3x - 7y = 12

1 and 2 by substitution

asked Dec 8, 2017 in ALGEBRA 1 by anonymous

1 Answer

0 votes

x +5y = 2

x=2-5y-------------------------------------(1)

3x - 7y = 12-------------------------------------(2)

Substitute 2-5y for x in equation (2).

3(2-5y) - 7y = 12

6-15y-7y =12

-22y = 6

y =-6/22 =-3/11

Substitute -3/11 for y in equation (1).

x=2-5(-3/11) =2+(15/11) =37/11

Solution is (37/11, -3/11)

answered Dec 12, 2017 by johnkelly Apprentice
reshown Dec 12, 2017 by bradely

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