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Slovel each pair of equation by subtitution

0 votes
x-y=7
x+y=9
asked Mar 18, 2014 in ALGEBRA 2 by abstain12 Apprentice

1 Answer

+1 vote

Substitution method :

The equations of linear system are image.

Solve the equation 1: imagefor y, since the y has a coefficient of .

Subtract x from each side.

image

Multiply each side by .

image.

Substitute the value of image in the equation 2: image and solve for x.

image
image

Add 7 to each side.

image

Divide each side by  2.

image.

Substitute the value of image in the equation image to find the value of y.

image

image.

The solution image.

answered Mar 19, 2014 by dozey Mentor
edited Mar 19, 2014 by dozey

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