California Algebra 1, 2007
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 PAGE: 454 SET: Exercises PROBLEM: 3
Please look in your text book for this problem Statement

The equations are

Equation (1)

Equation (2)

Multiply the first equation by 2

Now the equation is

Equation (1)

Since the coefficients of the x-terms, +2 and +2, are additive inverses,

you can eliminate these terms by adding the equations.

Subtract the equations to eliminate variable y.

(write the equations in column form and subtract)

(Divide each side by negative 5)

(Cancel common terms)

Now Substitute  1 for y in either equation to find the value of x.

(Equation 1)

(Replace y by 1 )

(Subtract 1 from each side)

(Apply additive inverse property: )

(Subtract: )

The solution is (x, y) = (1, 1)

The solution is (x, y) = (1, 1).

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