Question

Solve the following system of equations.
7x+6y = -4
4x + 6y = 8

Answer 1

x = -4

y = 4

Explanation:

Subtract the two equations

be sure to take the minus sign through the whole bottom equation

the 6y's will cancel and you are left with 3x = -12 or x =-4

Then take the x= -4 and plug it back into the top equation to get y = 4

Answer 2

(x,y) = (-4,4)

Explanation:

7x + 6y = -4

6y = 8 - 4x

substitute the value of 6y into the equation

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7x + 8 - 4x = -4

Solve

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x = -4

substitute the value of x into the equation

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6y = 8 - 4(-4)

solve

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y = 4

therefore,

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(x,y) = (-4,4)