1) 0,9х + 3/4х - 1,15х = 0,9х + 0,75х - 1,15х = 0,5х
х = 3
0,5 · 3 = 1,5.
2) 5 3/8у + 2,25у - 1 9/16у = 5,375у + 2,25у - 1,5625у = 6,0625у
у = 4
6,0625 · 4 = 24,25.
3) 1 5/6х - 2/3х + 0,25х = 1 10/12х - 8/12х + 3/12х = 1 5/12х
х = 6
1 5/12 · 6 = 8,5.
4) 6,12у + 1 2/5у - 0,32у = 6,12у + 2,4у - 0,32у = 8,2у
у = 5
8,2 · 5 = 41.