Let's solve your equation step-by-step.<span>5.4=<span>a−<span>(<span>−1.8</span>)</span></span></span>Step 1: Simplify both sides of the equation.<span>5.4=<span>a+1.8</span></span>Step 2: Flip the equation.<span><span>a+1.8</span>=5.4</span>Step 3: Subtract 1.8 from both sides.<span><span><span>a+1.8</span>−1.8</span>=<span>5.4−1.8</span></span><span>a=3.6</span>