Add <span>19x</span> and x to get <span>20x</span>.<span><span><span><span><span>20x</span><span>−y</span></span><span><span>−2</span>z</span></span>+<span>5y</span></span>+<span>2z</span></span>Add <span>−y</span> and <span>5y</span> to get <span>4y</span>.<span><span><span><span>20x</span>+<span>4y</span></span><span><span>−2</span>z</span></span>+<span>2z</span></span>Add <span><span>−2</span>z</span> and <span>2z</span> to get 0.<span><span><span>20x</span>+<span>4y</span></span>+0</span>Add <span>20x</span> and 0 to get <span>20x</span>.<span><span>20x</span>+<span>4<span>y </span></span></span>
hope i helped best of luck :) <span><span><span /></span></span>
