simultaneous equations

[young shale]

i need some help

[wet hollow]

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[novel narwhal]

substitution or elimination what do you think

[young shale]

substitution

[novel narwhal]

go ahead

[young shale]

i don’t get it at all

[novel narwhal]

you need to isolate a variable first

[young shale]

do i isolate 2y

[novel narwhal]

you can start with that