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0,01x+0,16x=-17
0,17x=-17 |:0,17
x=-1000
b)- 0,07(10x-1) = 0,3x
-0,7x+0,07=0,3x
0,07=0,3x+0,7x
0,07=10x |:10
x=0,007
c) 3/5y+2/5=4 |*5
3y+2=20
3y=20-2
3y=18 |:3
y=6
0,17x=17 /:0,17
x = 100
b) najpierw wymnażamy nawias:
-0,7x + 0,07 = 0,3x
x = 0,07
c) 3/5y + 2/5 = 4
3/5y = 18/5 \ :3/5
y=6
17 = - 0,17 x
x = - 100
b) - 0,07(10x-1) = 0,3x
-0,7 x + 0,07 = 0,3x
x = 0,07
c)
3/5 y + 2/5 = 4
3y + 2 = 20
y = 6