Question

Solve each pair of simultaneous equations by substitution method

Answer 1

x = 1 and y = -4

Explanation:

Let's substitute y = -4x into x + 3y = -11

x + 3(-4x) = -11

x - 12x = -11

-11x = -11

/-11 /-11

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x = 1

You can plug x = 1 into either of the given equations. Let's do x + 3y = -11

1 + 3y = -11

-1 -1

-----------------

3y = -12

/3 /3

-----------------

y = -4

Your values are, x = 1 and y = -4.

Answer 2

x = 1 y = -4

Explanation:

- Plug the value of y into the other equation.

x + 3y = -11

x + 3(-4x) = -11

x - 12x = -11

-11x = -11

x = 1

- Now substitute the value of x into any equation.

y = -4x

y = -4(1)

y = -4