SOLUTION: how do i work out this simultaneous equation?
2x-y=4
2y+x=7
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Question 25073: how do i work out this simultaneous equation?
2x-y=4
2y+x=7
Answer by Earlsdon(6294) (Show Source): You can put this solution on YOUR website!
Solve: You can use "substitution" to solve this.
1) Rewrite as: and substitute into equation 2)
2)
3) Simplify and solve for x.
Add 8 to both sides of the equation.
Divide both sides by 5.
Now substitute this into the rewrite of equation 1) to find y.
Solution is: (3, 2)
Check:
Equation 1)
Equation 2)
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