Question

For the following system, if you isolated x in the first equation to use the Substitution Method, what expression would you substitute into the second equation?
−x + 2y = 9
4x + 5y = 9
−9 + 2y
−9 − 2y
9 − 2y
9 + 2y

Answer 1

how do you think ,any idea ,opinion ?

Answer 2

no i have no idea :(

Answer 3

so there is

-x +2y =9

yes ?

on the first step i think that you can assuming to both sides x and check it please than what will get ?

Answer 4

please you cooperate anything ,ok ?

Answer 5

ok ill try

Answer 6

so than write it here

Answer 7

solve −x + 2y = 9 for x

Answer 8

-x +x +2y=9 +x

Answer 9

i think its −9 − 2y @jhonyy9

Answer 10

not is right

Answer 11

i like learn to you step by step

Answer 12

what? sorry i didnt understand

Answer 13

−x + 2y = 9

−x = 9 - 2y ... Subtract 2y from both sides.

x = -9 + 2y ... change the sign of every term to fully isolate x

Answer 14

9 − 2y @jim_thompson5910 i think its this on

Answer 15

no it's the one i wrote above

Answer 16

9-2y is NOT the same as -9 + 2y

Answer 17

-9 + 2y so it this one? :D

Answer 18

@jim_thompson5910

Answer 19

yes

Answer 20

thank you :)

Answer 21

yw