Question

Solve the system of equations by substitution. Show your work.
y = 2x - 1
6x - 2y = 24

Answer 1

x = 11

y = 21

Explanation:

1. y = 2x-1

2. 6x-2y = 24

lets plug in the value of y from the first equation, into the second

6x - 2(2x-1) = 24

6x - 4x + 2 = 24

2x + 2 = 24

2x = 22

x = 11

lets plug in x to the first equation to find y

y = 2(11)-1

y = 22-1

y = 21

Answer 2

x = 11

y = 21

Explanation:

y = 2x - 1;

6x - 2y = 24

y = 2x - 1

3x - y = 12

y = 2x - 1

3x - (2x - 1) = 12

y = 2x - 1

x + 1 = 12

y = 2x - 1

x = 11

y = 2(11) - 1

x = 11

y = 21

x = 11