Question

Solve the system of linear equations x - 3y = -3 x + 3y = 9

Answer 1

x = 3

y = 2

Explanation:

x - 3y = -3

x + 3y = 9

Solve for x in the second equation.

x = 9 - 3y

Pu x as 9 - 3y in the first equation and solve for y.

9 - 3y - 3y = -3

9 - 6y = -3

-6y = -12

y = 2

Put y as 2 in the second equation and solve for x.

x = 9 - 3(2)

x = 9 - 6

x = 3

Answer 2

x-3y= -3x +3y=9

collect like terms

-3x will go to x and it will turn to

x+3x And -3y will go to +3y and it will turn to

×+3x=+3y+3y=9

solving time.

x+3x is 4x

3y +3y =6y

4x+6y =9

remove the 4x for now.

6y divided by 9.

3 in 6 is 2 and 3 in 9 is 3.

therefore 4x =2=9

4/2=2

2x=9.

4and half is the answer