The equations are
Multiply the second equation by 3
Now the equation is
Equation (2)
Since the coefficients of the x-terms, +6 and -6, are additive inverses,
you can eliminate these terms by adding the equations. .
add the equations to eliminate variable x.
(Write the equations in column form and add)
Apply division property of equality: Divide each side by 7.
(Cancel common terms)
(Divide: )
Now Substitute for y in either equation to find the value of x.
(Equation 1)
(Multiply: )
Apply subtraction property of equality: Subtract 4 from each side.
(Apply additive inverse property: )
(Subtract: )
Apply division property of equality: Divide each side by 6.
(Cancel common terms)
(Divide: )
The solution is .
The solution is .
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