 class="multicols"><strong>c)</strong> <span class="inline_math">\( \frac{7x-4}{2} +1 = 8-2 \)</span>

<strong>d)</strong> <span class="inline_math">\( 5x-2+3=3x-5 \)</span>
</div>

</div>


<div class="miniref-exercise" data-number="1.2"><span class="exercise number">E1.2 </span>
Indicate all the number sets the following numbers belong to.

<div class="multicols"><strong>a)</strong> <span class="inline_math">\( -2 \)</span>

<strong>b)</strong> <span class="inline_math">\( \sqrt{-3} \)</span>

<strong