Can someone me with these?

solve each system of equations. check each answer algebraically.
11. -­6x + 3y = 33
-­4x + y = 16
12. 2y = 5x ­-1
x + y = -­1
13. x + y + z = -­1
2x + 4y + z = 1
x + 2y ­- 3z = ­-3

QUESTION 12

The given equations are;

and

Make y the subject in equation (2).

We put this equation (3) into equation (1) to get;

Expand;

Put into equation (3)

QUESTION 12

The given equations are

and

Make y the subject in equation (2)

Put equation (3) into (1)

Put into equation (3).

QUESTION 13

The given equations are

Make x the subject in equation (3).

Put equation (4) into equation (1)

Put equation (4) into equation (2)

Put z=1 in equation (5)

Put y=2 and z=1 into equation(4)

$8

step-by-step explanation:

it is pretty much backwards.

you take the 4x2 multiply that, and that is = $8

the argument of alfred t. mahan, henry cabot lodge, and albert j. beveridge was the economically and mass production the the americans could not consume themselves. this led expansion to sell to other foreign nations for profits.

step-by-step explanation:

this is my explanation