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solving linear equations of fractions by substution

Algebra
Tutor: None Selected Time limit: 1 Day

Find the solutions to the system of equation by substitution

y=2/7x+11/7

1/5x+4/7y=19/7

Apr 5th, 2015

plug y=2/7 x+11/7 into 1/5 x+4/7 y=19/7, you get:

1/5 x+4/7(2/7 x+11/7)=19/7

1/5 x+(8/49 x+44/49)=19/7

(1/5+8/49)x=19/7-44/49

89/245 x=89/49

x=245/49=5

so y=2/7*5+11/7=10/7+11/7=21/7=3

Apr 5th, 2015

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