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

Question

Mathematics

Taniya

13 December, 04:43

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

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Answers (1)

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Kelton French · Answer 1

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