<span>1. (456 + 112) - x = 400 </span>
<span>568 - х = 400</span>
<span>х = 568 - 400</span>
<span>х = 168</span>
<span>2. </span>x - (203 + 303) = 34
х - 506 = 34
х = 506 + 34
х = 540
3. <span>(283 - x) - 33 = 0 </span>
<span>283 - х = 0 + 33</span>
<span>283 - х = 33</span>
<span>х = 283 - 33</span>
<span>х = 250</span>
<span>4. <span>(536 + x) - 420 = 116</span></span>
<span><span>536 + х = 116 + 420</span></span>
<span><span>536 + х = 536</span></span>
<span><span>х = 536 - 536</span></span>
<span><span>х = 0</span></span>
<span><span>5. <span>437 - (227 + x) = 0 </span></span></span>
<span><span><span>227 + х = 437 - 0</span></span></span>
227 + х = 437
х = 437 - 227
х = 210
6. <span>468 - 217 - x = 51 </span>
<span>251 - х = 51</span>
<span>х = 251 - 51</span>
<span>х = 200</span>