| $17$ +
131
= $148$
|
$361$ - 94 = $267$ |
|
19
+ $26 = 45$ |
51 - $33 = 18$ |
$13 + x = 71$ |
$x = 58$ |
|
$x + 35 = 53$ |
$x = 18$ |
|
$x + 65 = 90$ |
$x = 25$ |
|
$x + 24 = 26$ |
$x = 2$ |
| $x$ | $19$ | $77$ |
$51$ |
$10$ |
| $x + 1$ | 20 |
78
|
52 |
11
|
| $13 + x$ |
32 | 90 | 64 | 23 |
| $81 - x$ |
62 | 4 | 30 |
71
|