Best Answer

x+7y=16 ---------------------------1

3x- 7y=4 ---------------------------2

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1+2

x+7y=16

3x-7y=4

4x=20

x=5

substitute x = 5 in x+7y=16

(5)+7y=16

7y=11

y=11/7

Q: Use elimination to solve the system x plus 7y equals 16 and 3x - 7y equals 4?

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16

(2,3)

The solutions are: x = -2 and y = 4

x=b-a

(20 - x)/5

Related questions

By elimination: x = 3 and y = 0

y=16 x= -4

(2,-2)

The elimination method only works with simultaneous equations, hence another equation is needed here for it to be solvable.

2x + 2y = 44x + y = 1There are many methods you can use to solve this system of equations (graphing, elimination, substitution, matrices)...but no matter what method you use, you should get x = -1/3 and y = 7/3.

No. Solving equations in two unknowns requires two independent equations. Since you have only one equation there is no solution.

16

You cannot solve one linear equation in two variables. You need two equations that are independent.

Yes and it works out that x = 3 and y = 4

x=35

The answer is that it cannot be done. To solve a set of equations in k variables (in this case, 2) you need at least two independent equations.

Solving by elimination: p = 3 and q = -2