1)87:(4х+5)=3
4х+5=87:3
4х+5=29
4х=29-5
4х=24
х=24:4
х=6
---------------------
87:(4*6+5)=3
3=3
<span>2)17*(3x-16)=85
</span> 3х-16=85:17
3х-16=5
3х=5+16
3х=21
х=21:3
х=7
---------------------
<span>17*(3*7-16)=85
</span> 85=85
<span>3)9*(6x-13)=153
</span> 6х-13=153:9
6х-13=17
6х=17+13
6х=30
х=30:6
х=5
-----------------------------
9*(6*5-13)=153
153=153
<span>4)3*(8x+51)=201
</span> 8х+51=201:3
8х+51=67
8х=67-51
8х=16
х=16:8
х=2
-----------------------
<span>3*(8*2+51)=201
</span>201=201
<span>5)(46x-57):3=27
</span> 46х-57=27*3
46х-57=81
46х=81+57
46х=138
х=138:46
х=3
-------------------------
(46*3-57):3=27
27=27
<span>6)(19x+62):15=13
</span> 19х+62=13*15
19х+62=195
19х=195-62
19х=133
х=133:19
х=7
-----------------------------
<span>(19*7+62):15=13</span>
13=13
36*<span>10000= 360000</span>
<span>
</span>
<span>Легкое задание :)</span>
1)603•84+2 536=50 652+2 536=53 218
2)318 •56- 5 967= 17 808-5 967=11 841
(x+3)^2+(x-7)^2=2x^2
x2+6x+9+x2-14x+49=2x2 здесь x2 это xквадрат
-8x+58=0
8x= 58 x=58/8=7.25