I request help on linear equations solving with elimination

[Monsterscore]

 

[Monsterscore]

Never mind solved it

 

[schoolhelpnow.com]

I see that you solved it, but here are some pointers for the future:

Always get the equation into y = mx + b so it will generally be either add/subtract the x, and then divide out the y to get it alone. Also, y = mx + b can also look like y = mx - b or y = b

If you ever have a negative y=, simply flip the sign of all of the equation. Example: x - y = 4 : I would subtract x but that would leave me with -y = -x+4, so flip all of the signs so it reads y = x -4

Hopefully this helps!

 

[lookagain]

I see that you solved it, but here are some pointers for the future:

Always get the equation into y = mx + b ...

No, that is not the approach to take. This is by elimination. If the two variables
are on the same side of the equation in each equation, then leave them there.
Efficiency of steps is desirable. Here is an example:

x + y = 9
x - y = 1
---------------

An option) Add the equations to eliminate the y terms:

2x = 10
x = 5

Substitute back into either of the original equations to solve for y.

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Another option) Subtract the second equation from the first equation to
eliminate the x terms:

2y = 8
y = 4

Substitute back into either of the original equations to solve for x.