<span><span>y=<span><span>4x</span>−1</span></span>;<span>y=<span><span>2x</span>−5 </span></span></span><span>Step: Solve <span>y=<span><span>4x</span>−1 </span></span>for y: </span><span>Step: Substitute <span><span>4x</span>−1 </span>for y in <span><span>y=<span><span>2x</span>−5</span></span>: </span></span><span>y=<span><span>2x</span>−5 </span></span><span><span><span>4x</span>−1</span>=<span><span>2x</span>−5 </span></span><span><span><span><span><span>4x</span>−1</span>+<span>−<span>2x</span></span></span>=<span><span><span>2x</span>−5</span>+<span>−<span>2x</span></span></span></span>(Add -2x to both sides) </span><span><span><span>2x</span>−1</span>=<span>−5 </span></span><span><span><span><span><span>2x</span>−1</span>+1</span>=<span><span>−5</span>+1</span></span>(Add 1 to both sides) </span><span><span>2x</span>=<span>−4 </span></span><span><span><span><span>2x/</span>2</span>=<span><span>−4/</span>2</span></span>(Divide both sides by 2) </span><span>x=<span>−2 </span></span><span>Step: Substitute<span>−2 </span>for x in <span><span>y=<span><span>4x</span>−1</span></span>: </span></span><span>y=<span><span>4x</span>−1 </span></span><span>y=<span><span><span>(4)</span><span>(<span>−2</span>)</span></span>−1 </span></span><span><span>y=<span>−9</span></span>(Simplify both sides of the equation) </span><u>Answer:</u><span><span>y=<span>−<span><span>9<span> and </span></span>x</span></span></span>=<span>−<span>2</span></span></span>
