Q. Solve using elimination.x+9y=9–4x−9y=18(_____, _____)
Write Equations: Write down the system of equations to be solved using elimination.x+9y=9–4x−9y=18
Add Equations: Add the two equations together to eliminate y.(x+9y)+(–4x−9y)=9+18
Check Elimination: Perform the addition to see if y is eliminated.x−4x+9y−9y=9+18−3x=27
Solve for x: Solve for x by dividing both sides of the equation by -3").\(\newline\$-3x / -3 = 27 / -3\)\(\newline\)\(x = -9\)
Substitute \(x\): Substitute \(x = -9\) into one of the original equations to solve for \(y\). Using the first equation: \(x + 9y = 9\) \(-9 + 9y = 9\)
Isolate y Term: Add \(9\) to both sides of the equation to isolate the term with \(y\).\(\newline\)\(9y = 9 + 9\)\(\newline\)\(9y = 18\)
Solve for y: Divide both sides of the equation by \(9\) to solve for y.\(\newline\)\(\frac{9y}{9} = \frac{18}{9}\)\(\newline\)\(y = 2\)
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