Hello Aboswell05, Let's solve for d.<span><span><span> 12y</span>+d</span>=<span><span>−<span>19y</span></span>+t</span></span> Step 1: Add -12y to both sides.<span><span /></span><span><span><span> d+<span>12y</span></span>+<span>−<span>12y</span></span></span>=<span><span>t−<span>19y</span></span>+<span>−<span>12y</span></span></span></span><span /><span> d=<span>t−<span>31y</span></span></span>Answer:<span> d=<span>t−<span>31y. if this is not the answer correct me and ill redo the question. </span></span></span>