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07-05-2016
Mathematics

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Solve by multiplication and addition. Show each step of your work.

4x – 3y = 11
3x + y = 18

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apologiabiology apologiabiology

07-05-2016

basically eliminate
try eliminate y's
multiply second equaiton by 3
9x+3y=54

add to other equation
4x-3y=11
9x+3y=54 +
13x+0y=65

13x=65
divide 13 both sides
x=5

sub back
3x+y=18
3*5+y=18
15+y=18
minus 15
y=3

x=5
y=3
(5,3)

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