Question

Solve the following system by substitution:

a) x = -3, y = 18

b) x = 3, y = -18

c) x = -3, y = -18

d) x = 3, y = 18

Answer 1

To solve the system of equations by substitution, substitute the given values of x and y into one of the equations to find the value of the other variable.

Step-by-step explanation:

To solve the system of equations by substitution, we substitute the given values of x and y into one of the equations to find the value of the other variable. Let's use equation a) x = -3, y = 18 as an example:

Substituting x = -3 into equation 1: 2x - y = 6

2(-3) - y = 6

-6 - y = 6

-y = 6 + 6

-y = 12

y = -12

So the solution is x = -3, y = -12. Therefore, the correct answer is option c) x = -3, y = -18.