Question

Решите уравнение 
а)0,12+0,76х=0,66(х+1) 
б)0,005(х+2)=0,007х+0,001(х-5)

Answer 1

а) 0.12+0.76х=0.66(х+1)
0.12+0.76=0.66х+0.66
-0.66х+0.76х=-0.12+0.66
0.1х=0.54
х=0.54:0.1
х=5.4

Answer 2

а)0,12+0,76х=0,66(х+1)    | *100
12 + 76X = 66X + 66
76X - 66X = 66 - 12
10X = 54
X = 5,4

б)0,005(х+2)=0,007х+0,001(х-5)    | *1000
5X + 10 = 7X + X - 5
10 +5 = 8X - 5X
3X = 15
X = 5