(<span>х+72)÷52=11
</span>(х+72)=52*11
(х+72)=572
х=572-72
х=500
__________
(500+72):52=11
11=11
<span>а-(25+17)=49
</span><span>а-25-17=49
</span>а=49+<span>25+17
</span>a = 91
____________
91-(25+17) = 49
<span>(61-25)+b=94
</span><span>61-25+b=94
</span>b=94 - 61+<span>25
</span>b=58
<span>____________
</span><span>(61-25)+58=94
Сразу не-за-что!</span>