Answer:
3 sips equal a gulp
Step-by-step explanation:
we have
[tex]5sips+4gulps=1glass[/tex] ----> equation A
[tex]13sips+7gulps=2glass[/tex]
Divide by 2 both sides
[tex]6.5sips+3.5gulps=1glass[/tex] ----> equation B
equate equation A and equation B
[tex]5sips+4gulps=6.5sips+3.5gulps[/tex]
Group terms that contain the same variable
[tex]4gulps-3.5gulps=6.5sips-5sips[/tex]
[tex]0.5gulps=1.5sips[/tex]
[tex]gulps=(1.5/0.5)sips[/tex]
[tex]gulps=3sips[/tex]
therefore
3 sips equal a gulp