Question

Решите уравнение:
3(0,5x-4)+8,5x=18

Answer 1

1.5x-12+8.5x-18=0
10x-30=0
10x=30
x=3

Answer 2

3(0.5x-4)+8.5x=18
1.5x -12 +8.5x=18
10x=18+12
x= 30:10
х=3
---------------------------
3(0.5*3 -4) +8.5 *3  =18
3(1.5-4) + 25.5 =18
3* (-2.5) +25.5=18
-7.5  + 25.5 = 18
18=18