<span>1) 0,5x - 18 = 2x - 21
0,5x - 2x = -21 + 18
-1,5x = -3
1,5x = 3
x = 3/1,5
x = 2
2) 3/4x + 12 = 2 (0,25 + 3/4x) + 8,5
</span>3/4x + 12 = 0,5 + 6/4x + 8,5
3/4x - 6/4x = 0,5 + 8,5 - 12
-3/4x = -3
3/4x = 3
3x = 4 * 3 = 12
x = 12/3
x = 4
<span>
3) x - 2 = 98
x = 98 + 2
x = 100
4) 3/4 + 0,25 + 1/2 + 0,5 = x
x = 0,75 + 0,25 + 0,5 + 0,5
x = 2
5) 18 * (x - 1/3) = 0,5 + 2,3x + 4,6
18x - 6 = </span>0,5 + 2,3x + 4,6
18x - 2,3x = 0,5 + 4,6 - 6
<span>15,7x = -0,9
x = -0,9/15,7
</span>
(100011 - 99996) x 3 = 15:3 = 5
1) 6а-6а+а=66
а=66
2)7х-х-5х+34=73
х=73-34
х=39
3)2у+3у-4у+29=62
у=62-29
у=33
59814 - 678*36:9 + 43794:6 = 49.803
1) 678*36=24.408
2) 24.408:9=2712
3) 43794:6=7299
4)59812-2712=57.102
5) 57.102 +7299 = 49.803
1000 - 31518:153+571154:89 =7211
1) 31518:153=206
2) 571154:89= 6.417
3) 1000-206=794
4)794+6.417=7211