Yes, this is because 2*4 equals 8
Multiply the first equation by -2. It turns into 4x+18y=50 and the other one stays -4x-9y=-23. Then you "eliminate" the equations by "adding" them. Set it up like this:
4x+18y=50
+
-4x-9y=-23
4x-4x= 0. 18y-9y= 9y and 50-23= 27
SO: 9y= 27 and y= 3
And then you plug that in to one equation: 4x +18(3)= 50. 4x= 50-(18*3)
4x= -4, so x=-1.
Plug it back in to check!
Hope this helps. Happy solving! :)
Answer:
The equation for this should be 1.49x + 1.25y = 100
Barbara needed to find the total of iced teas AND the total of water bottles that sells.
Step-by-step explanation:
Word form: three thousand sixty five hundred and fifty six
Expanded form: 300,000 + 60,000 + 500 + 50 + 6