Solve for x?

Question

2x+y=7 solve x=5

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Answer 1 · 2018-05-28T17:44:29

#y=-3#
#x=5#

The question has already been solved for #x# as the term for #x=5#. Did you mean solve for #y#? Please correct me if I'm wrong.

#2x+y=7#

Substitute #5# for #x#, then solve for #y#:

#2(5)+y=7#
#10+y=7#
#y=7-10#
#y=-3#

If you substitute #-3# for #y# and solve for #x#, you should get #5# again:

#2x-3=7#
#2x=7+3#
#x=10/2#
#x=5#