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3x plus 10y equals 7 -8x - 4y equals 17?
Multiply the first by 8 and the second by 3
6y-5 equals 8 plus 10y?
6y-5=8+10y 6y-10y=8+5 -4y=13 y=-3.,25 because: 6*3.25-5=-24,5 and 8+10*3.25=-24,5 true
Y plus x equals 9 10y plus 20x equals 100?
y + x = 9 10y + 20x = 100 This is a basic linear system of equalities. We can start by rewriting the first equation as: -10y - 10x = -90 by multiplying the equation by -10, from here we can eliminate y and solve for x (-10y - 10x = -90) + (10y + 20x = 100) = (10x = 10) This yields x = 1, and by plugging x into the first equation y = 8
Is x equals 6 and y equals 8 then 9x plus 10y equals?
Oh, dude, let's break it down. So, if x equals 6 and y equals 8, we just plug those values into the expression. 9 times 6 is 54, and 10 times 8 is 80. Add those up, and you get 134. Ta-da!
If 10y-6 is equal to 2 plus 4y what does y equal?
you have to bring the "y" to one side. 10y - 6 = 2 + 4y 10y-4y = 2 + 6 6y = 8 y = 8/6 If you substitute 8/6 into y you will find that 8/6 is the answer
