Simplify 2(x+3)-5(x-1)

-3x + 11

Step-by-step explanation:

The best method to solve this problem is using distributive property.

2(x + 3) = 2x + 6

5(x - 1) = 5x - 5

(2x + 6) - (5x - 5)

Open parenthesis, change the negative sign in the parenthesis to a positive sign because there is a negative sign in front.

2x + 6 - 5x + 5 = -3x + 11

Hope this helps :)

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,

12r - 8 - 12

you have to combine like terms. below i have bolded the like terms:

12r - 8 - 12

together it combines to:

12r - 20

hope this !