cjhowep8e0oq
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  • 08-05-2018
  • Mathematics
contestada

Solve the system of equations for 7x+2y=16 and -21x-6y=24

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Morgan71306
Morgan71306 Morgan71306
  • 08-05-2018
Simplifying
7x + 2y = 16

Solving
7x + 2y = 16

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-2y' to each side of the equation.
7x + 2y + -2y = 16 + -2y

Combine like terms: 2y + -2y = 0
7x + 0 = 16 + -2y
7x = 16 + -2y

Divide each side by '7'.
x = 2.285714286 + -0.2857142857y

Simplifying
x = 2.285714286 + -0.2857142857y
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