Question

Solve the systems using substitution.
5x - 4y = 14
x - 2y = -2

Answer 1

solve the second equation for x, then replce in the first equation

Answer 2

5x - 4y = 14
x - 2y =2 OR x = 2 + 2y

Substitute and solve.
5(2 + 2y) - 4y = 14

Answer 3

equation 1 : 5x - 4y = 14
equation 2 : x - 2y = -2 -> x= 2y -2

So substitute 2y - 2 in place of x in the first equation and solve for y.

5(2y-2)-4y = 14
10y - 10 - 4y = 14
6y = 14+ 10
y = 24/6
y = 4

Then plug in the y value into equation 2 and solve for x.

x = 2y-2
x=2(4)-2
x=6

Answer 4

Oh, it's - 2. o: