substitution method to solve

label Algebra
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{x-2y=2

{2x+3y=11

Apr 14th, 2015

X=2-2Y

2(2-2Y)+3Y=11

4-4Y+3Y=11

-4Y+3Y=11-4

-Y=7

Y=-7

X=2-2(-7)

X=2+14

X=16

Y=-7


Apr 14th, 2015

Im sorry the first line was =-2

Apr 15th, 2015

you mean x-2y=-2

2x-2y=11

x=2y-2

2(2y-2)+3y=11

4y-4+3y=11

7y=15

y=2 1/7

x=2(15/7)-2

x=4 2/7 -2

x=2 2/7

y=2 1/7

Apr 15th, 2015

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Apr 14th, 2015
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