Floyd86
Floyd86
24-09-2017
Mathematics
contestada
solve using multiplication and check
Respuesta :
kphung76127
kphung76127
24-09-2017
Cross multiply to solve
(-3r)(4)=(-27)(2)
Multiply on both sides
-12r=-54
Divide both sides by -12
r=4.5
Final answer: r=4.5
Check:
-3(4.5)= -13.5
-13.5/2= -6.75
-27/4=-6.75
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