cheyennegenevie cheyennegenevie

13-01-2017
Mathematics

Answered

What's the solution of the system?

7x+5y=19

-7x-2y=-16

Verified Answer :

apologiabiology apologiabiology

13-01-2017

add them equations, y's cancel

7x+5y=19
-7x-2y=-16 +
0x+3y=3

3y=3
divide by 3
y=1

sub back
7x+5y=19
7x+5(1)=19
7x+5=19
minus 5 both sides
7x=14
divide by 7
x=2

(x,y)
(2,1)

solution is (2,1)

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