Question

решить уровнения x-299 - 400
x + 200 = 4200
408 + x = 6400
y + 6691 = 8030
72 031 + a = 86 325
963 250 - y = 820 315
a- 46 083 = 668
y - 3871 = 629
C + 516 = 9005
+ =
d - 769 = 32 057
* - 2066 = 72 526
15 470 - y = 8415
80 815 - a - 2129
3358 + b = 48 072
90 050 - a = 3806
18 349 - C = 3120
I
(128 + 49) - X = 28
X - (133 + 75) = 32
145 - (x + 45) = 50
(39 + x) - 27 = 22
500 - (120 - x) = 479-99
220 + (x - 120) =997 -736
472-(Z - 444) = 302
6x + 131 = 437
490 - y. 7 = 350​

Answer 1

1)

$x - 299 = 400\\x = 400 + 299\\x = 699$

2)

$x + 200 = 4200\\x = 4200 - 200\\x = 4000$

3)

$408 + x = 6400\\x = 6400 - 408\\x = 5992$

4)

$y + 6691 = 8030\\y = 8030 - 6691\\y =1339$

5)

$72 031 + a = 86 325\\a = 86325 - 72 031\\a =14294$

6)

$963 250 - y = 820 315\\-y = 820315 - 963250\\-y = -142935\\y = 142935$

7)

$a- 46 083 = 668\\a = 668 + 46083\\a = 46751$

8)

$y - 3871 = 629\\y = 629 + 3871\\y =4500$

9)

$c + 516 = 9005\\c = 9005 - 516\\c= 8489$

10)

$d - 769 = 32 057\\d = 32057 + 769\\d = 32826$

11)

$x - 2066 = 72 526\\x= 72 526 + 2066\\x = 74592$

12)

13)

14)

15)