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What is Twice the sum of a number and 4 equals 9?
2 ( x + 4 ) = 92x + 8 = 92x = 9 - 82x = 1x = 1 / 2x = 0.5
If x equals 5 and y equals 9 then 2x plus 11 equals?
X=5Y= 92x + 11= ?2(5)+11=?10+11= 21
What is 2x plus 3 equals 9 what does x equal?
2x + 3 = 92x = 9 - 32x = 6x = 6/2x = 3
What is the correct way to write the solution of 2x - 5y equals 9 and 8x - 20y equals 5?
It has no solution!!!The two equations contradict.If you recast the first in terms of x2x-5y=92x=5y+9x=2.5y+4.5Then substitute for x in the second equation8x-20y=58(2.5y+4.5)-20y=520y+36-20y=536=5 (False)which is not true - so the equations have differing values for x and/or y and so are not solveable.
Use linear combinations to solve the system.. negative 6x plus 8y equals 36 and 7x plus 6y equals 4 Find X and Y?
1. -6x + 8y = 362. 7x + 6y = 46y = 4 - 7xy = (4-7x)/6 Put this in the first equation and solve-6x + 8((4-7x)/6) = 36-36x + 8(4-7x) = 216 Multiply with 6 to simplify.-36x + 32 - 56x = 216-36x -56x = 216 - 32-92x = 184x = 184/-92x = -2X = - 2Now that you have X, put it in any of the equations above to solve Y.7x + 6y = 4 Put in x = -27(-2) + 6y = 4-14 + 6y = 46y = 4 + 14y = 18/6y = 3Y = 3
