Y=2x and x+3y=-14 substitution to solve each system of equations

You can use the substitution method.

You substitute the first equation to the second equation to get the value of x.

x + 3y = - 14

x + 3 (2x) = - 14

x + 6x = - 14

7x = - 14

x = - 14/7 = - 2

Substitute the value of x to the first equation.

y = 2 (-2) = 4