Question

Solve by elimination.

2x - 5y = 11
4x + 10y = 18

HELP

Answer 1

@algebra2sucks did you try this? do you know to use elimination method?

Answer 2

not 2 sure of it i'm not that good in algebra 2

Answer 3

Could you tell how did you approach?

Answer 4

what ui do it as 2 combing the questions or solving each one for its own?

Answer 5

In elimination method. To solve a pair of linear equations, we'd eliminate one of the two variable.
First step: Multiply both or one of the equations by some appropriate constants
Second step: Add or subtract the equations to eliminate on of the variables.
I'll illustrate this methodology here

Answer 6

Are you here?

Answer 7

[2x - 5y = 11 ] * 2 ==> 4x - 10y = 22
4x + 10y = 18

===================
4x - 10y = 22
4x + 10y = 18
-------------add both equations

Answer 8

so do i add 22 and 18? or 4x and 10y or both and make it into one equation?

Answer 9

yes

Answer 10

40 + 14?

Answer 11

@surdawi or @ash2326 is that right?

Answer 12

\[4x - 10y = 22 \]
\[4x + 10y = 18 \]
Add all the terms, remember that x can only be combined with an x not a y or 22 or 18
\[(4x+4x)+-10y+10y=22+18\]
what would you get?

Answer 13

4x + 4x = 8x
-10y + 10y = 0y
22 + 18 = 40

Answer 14

\[8x+0y=40\]

Answer 15

so do i have to make it more simple to get one answer?

Answer 16

8x = 40

now?

Answer 17

would i divide the two?

Answer 18

yes, what do u get

Answer 19

5x?

Answer 20

show me how?

Answer 21

i'm not sure i did it on a calculater when i did it both ways first i got 0.2

Answer 22

what numbers did u plug in

Answer 23

i put 40/8 and got 5
when i put 8/40 i got 0.2

Answer 24

8x = 40
/8 /8
x = 5

Answer 25

thank you for all ur help